diff --git a/lib/qcd/action/fermion/CayleyFermion5D.cc b/lib/qcd/action/fermion/CayleyFermion5D.cc
index 894ef938..0f682971 100644
--- a/lib/qcd/action/fermion/CayleyFermion5D.cc
+++ b/lib/qcd/action/fermion/CayleyFermion5D.cc
@@ -276,7 +276,7 @@ void CayleyFermion5D<Impl>::Meooe       (const FermionField &psi, FermionField &
 {
   Meooe5D(psi,this->tmp()); 
 
-  if ( psi.checkerboard == Odd ) {
+  if ( psi.Checkerboard() == Odd ) {
     this->DhopEO(this->tmp(),chi,DaggerNo);
   } else {
     this->DhopOE(this->tmp(),chi,DaggerNo);
@@ -287,7 +287,7 @@ template<class Impl>
 void CayleyFermion5D<Impl>::MeooeDag    (const FermionField &psi, FermionField &chi)
 {
   // Apply 4d dslash
-  if ( psi.checkerboard == Odd ) {
+  if ( psi.Checkerboard() == Odd ) {
     this->DhopEO(psi,this->tmp(),DaggerYes);
   } else {
     this->DhopOE(psi,this->tmp(),DaggerYes);
diff --git a/lib/qcd/action/fermion/CayleyFermion5Dcache.cc b/lib/qcd/action/fermion/CayleyFermion5Dcache.cc
index 004dcffe..9af9dc75 100644
--- a/lib/qcd/action/fermion/CayleyFermion5Dcache.cc
+++ b/lib/qcd/action/fermion/CayleyFermion5Dcache.cc
@@ -47,32 +47,32 @@ void CayleyFermion5D<Impl>::M5D(const FermionField &psi,
 {
   int Ls =this->Ls;
   GridBase *grid=psi._grid;
-  assert(phi.checkerboard == psi.checkerboard);
-  chi.checkerboard=psi.checkerboard;
+  assert(phi.Checkerboard() == psi.Checkerboard());
+  chi.Checkerboard()=psi.Checkerboard();
   // Flops = 6.0*(Nc*Ns) *Ls*vol
   M5Dcalls++;
   M5Dtime-=usecond();
 
   parallel_for(int ss=0;ss<grid->oSites();ss+=Ls){ // adds Ls
     for(int s=0;s<Ls;s++){
-      auto tmp = psi._odata[0];
+      auto tmp = psi[0];
       if ( s==0 ) {
-	spProj5m(tmp,psi._odata[ss+s+1]);
+	spProj5m(tmp,psi[ss+s+1]);
 	chi[ss+s]=diag[s]*phi[ss+s]+upper[s]*tmp;
 
-	spProj5p(tmp,psi._odata[ss+Ls-1]);
+	spProj5p(tmp,psi[ss+Ls-1]);
 	chi[ss+s]=chi[ss+s]+lower[s]*tmp;
       } else if ( s==(Ls-1)) {
-	spProj5m(tmp,psi._odata[ss+0]);
+	spProj5m(tmp,psi[ss+0]);
 	chi[ss+s]=diag[s]*phi[ss+s]+upper[s]*tmp;
 
-	spProj5p(tmp,psi._odata[ss+s-1]);
+	spProj5p(tmp,psi[ss+s-1]);
 	chi[ss+s]=chi[ss+s]+lower[s]*tmp;
       } else { 
-	spProj5m(tmp,psi._odata[ss+s+1]);
+	spProj5m(tmp,psi[ss+s+1]);
 	chi[ss+s]=diag[s]*phi[ss+s]+upper[s]*tmp;
 
-	spProj5p(tmp,psi._odata[ss+s-1]);
+	spProj5p(tmp,psi[ss+s-1]);
 	chi[ss+s]=chi[ss+s]+lower[s]*tmp;
       }
     }
@@ -90,33 +90,33 @@ void CayleyFermion5D<Impl>::M5Ddag(const FermionField &psi,
 {
   int Ls =this->Ls;
   GridBase *grid=psi._grid;
-  assert(phi.checkerboard == psi.checkerboard);
-  chi.checkerboard=psi.checkerboard;
+  assert(phi.Checkerboard() == psi.Checkerboard());
+  chi.Checkerboard()=psi.Checkerboard();
 
   // Flops = 6.0*(Nc*Ns) *Ls*vol
   M5Dcalls++;
   M5Dtime-=usecond();
 
   parallel_for(int ss=0;ss<grid->oSites();ss+=Ls){ // adds Ls
-    auto tmp = psi._odata[0];
+    auto tmp = psi[0];
     for(int s=0;s<Ls;s++){
       if ( s==0 ) {
-	spProj5p(tmp,psi._odata[ss+s+1]);
+	spProj5p(tmp,psi[ss+s+1]);
 	chi[ss+s]=diag[s]*phi[ss+s]+upper[s]*tmp;
 
-	spProj5m(tmp,psi._odata[ss+Ls-1]);
+	spProj5m(tmp,psi[ss+Ls-1]);
 	chi[ss+s]=chi[ss+s]+lower[s]*tmp;
       } else if ( s==(Ls-1)) {
-	spProj5p(tmp,psi._odata[ss+0]);
+	spProj5p(tmp,psi[ss+0]);
 	chi[ss+s]=diag[s]*phi[ss+s]+upper[s]*tmp;
 
-	spProj5m(tmp,psi._odata[ss+s-1]);
+	spProj5m(tmp,psi[ss+s-1]);
 	chi[ss+s]=chi[ss+s]+lower[s]*tmp;
       } else { 
-	spProj5p(tmp,psi._odata[ss+s+1]);
+	spProj5p(tmp,psi[ss+s+1]);
 	chi[ss+s]=diag[s]*phi[ss+s]+upper[s]*tmp;
 
-	spProj5m(tmp,psi._odata[ss+s-1]);
+	spProj5m(tmp,psi[ss+s-1]);
 	chi[ss+s]=chi[ss+s]+lower[s]*tmp;
       }
     }
@@ -130,13 +130,13 @@ void CayleyFermion5D<Impl>::MooeeInv    (const FermionField &psi, FermionField &
   GridBase *grid=psi._grid;
   int Ls=this->Ls;
 
-  chi.checkerboard=psi.checkerboard;
+  chi.Checkerboard()=psi.Checkerboard();
 
   MooeeInvCalls++;
   MooeeInvTime-=usecond();
 
   parallel_for(int ss=0;ss<grid->oSites();ss+=Ls){ // adds Ls
-    auto tmp = psi._odata[0];
+    auto tmp = psi[0];
 
     // flops = 12*2*Ls + 12*2*Ls + 3*12*Ls + 12*2*Ls  = 12*Ls * (9) = 108*Ls flops
     // Apply (L^{\prime})^{-1}
@@ -175,8 +175,8 @@ void CayleyFermion5D<Impl>::MooeeInvDag (const FermionField &psi, FermionField &
   GridBase *grid=psi._grid;
   int Ls=this->Ls;
 
-  assert(psi.checkerboard == psi.checkerboard);
-  chi.checkerboard=psi.checkerboard;
+  assert(psi.Checkerboard() == psi.Checkerboard());
+  chi.Checkerboard()=psi.Checkerboard();
 
   std::vector<Coeff_t> ueec(Ls);
   std::vector<Coeff_t> deec(Ls);
@@ -195,7 +195,7 @@ void CayleyFermion5D<Impl>::MooeeInvDag (const FermionField &psi, FermionField &
 
   parallel_for(int ss=0;ss<grid->oSites();ss+=Ls){ // adds Ls
 
-    auto tmp = psi._odata[0];
+    auto tmp = psi[0];
 
     // Apply (U^{\prime})^{-dagger}
     chi[ss]=psi[ss];
diff --git a/lib/qcd/action/fermion/CayleyFermion5Ddense.cc b/lib/qcd/action/fermion/CayleyFermion5Ddense.cc
index a489cf09..ed29674f 100644
--- a/lib/qcd/action/fermion/CayleyFermion5Ddense.cc
+++ b/lib/qcd/action/fermion/CayleyFermion5Ddense.cc
@@ -57,7 +57,7 @@ void CayleyFermion5D<Impl>::MooeeInternal(const FermionField &psi, FermionField
   int LLs = psi._grid->_rdimensions[0];
   int vol = psi._grid->oSites()/LLs;
   
-  chi.checkerboard=psi.checkerboard;
+  chi.Checkerboard()=psi.Checkerboard();
   
   assert(Ls==LLs);
   
diff --git a/lib/qcd/action/fermion/CayleyFermion5Dssp.cc b/lib/qcd/action/fermion/CayleyFermion5Dssp.cc
index 887def5a..80cc4688 100644
--- a/lib/qcd/action/fermion/CayleyFermion5Dssp.cc
+++ b/lib/qcd/action/fermion/CayleyFermion5Dssp.cc
@@ -89,7 +89,7 @@ void CayleyFermion5D<Impl>::MooeeInv    (const FermionField &psi, FermionField &
 {
   Coeff_t one(1.0);
   Coeff_t czero(0.0);
-  chi.checkerboard=psi.checkerboard;
+  chi.Checkerboard()=psi.Checkerboard();
   int Ls=this->Ls;
   // Apply (L^{\prime})^{-1}
   axpby_ssp (chi,one,psi,     czero,psi,0,0);      // chi[0]=psi[0]
@@ -118,7 +118,7 @@ void CayleyFermion5D<Impl>::MooeeInvDag (const FermionField &psi, FermionField &
 {
   Coeff_t one(1.0);
   Coeff_t czero(0.0);
-  chi.checkerboard=psi.checkerboard;
+  chi.Checkerboard()=psi.Checkerboard();
   int Ls=this->Ls;
   // Apply (U^{\prime})^{-dagger}
   axpby_ssp (chi,one,psi,     czero,psi,0,0);      // chi[0]=psi[0]
diff --git a/lib/qcd/action/fermion/CayleyFermion5Dvec.cc b/lib/qcd/action/fermion/CayleyFermion5Dvec.cc
index 21800523..662a5f46 100644
--- a/lib/qcd/action/fermion/CayleyFermion5Dvec.cc
+++ b/lib/qcd/action/fermion/CayleyFermion5Dvec.cc
@@ -68,9 +68,9 @@ void CayleyFermion5D<Impl>::M5D(const FermionField &psi,
   Vector<iSinglet<Simd> > d(LLs);
 
   assert(Ls/LLs==nsimd);
-  assert(phi.checkerboard == psi.checkerboard);
+  assert(phi.Checkerboard() == psi.Checkerboard());
 
-  chi.checkerboard=psi.checkerboard;
+  chi.Checkerboard()=psi.Checkerboard();
 
   // just directly address via type pun
   typedef typename Simd::scalar_type scalar_type;
@@ -212,9 +212,9 @@ void CayleyFermion5D<Impl>::M5Ddag(const FermionField &psi,
   Vector<iSinglet<Simd> > d(LLs);
 
   assert(Ls/LLs==nsimd);
-  assert(phi.checkerboard == psi.checkerboard);
+  assert(phi.Checkerboard() == psi.Checkerboard());
 
-  chi.checkerboard=psi.checkerboard;
+  chi.Checkerboard()=psi.Checkerboard();
 
   // just directly address via type pun
   typedef typename Simd::scalar_type scalar_type;
@@ -765,7 +765,7 @@ void CayleyFermion5D<Impl>::MooeeInternal(const FermionField &psi, FermionField
   int LLs = psi._grid->_rdimensions[0];
   int vol = psi._grid->oSites()/LLs;
 
-  chi.checkerboard=psi.checkerboard;
+  chi.Checkerboard()=psi.Checkerboard();
   
   Vector<iSinglet<Simd> >  Matp;
   Vector<iSinglet<Simd> >  Matm;
diff --git a/lib/qcd/action/fermion/ContinuedFractionFermion5D.cc b/lib/qcd/action/fermion/ContinuedFractionFermion5D.cc
index 94384b5f..eb1781b2 100644
--- a/lib/qcd/action/fermion/ContinuedFractionFermion5D.cc
+++ b/lib/qcd/action/fermion/ContinuedFractionFermion5D.cc
@@ -146,7 +146,7 @@ void   ContinuedFractionFermion5D<Impl>::Meooe       (const FermionField &psi, F
   int Ls = this->Ls;
 
   // Apply 4d dslash
-  if ( psi.checkerboard == Odd ) {
+  if ( psi.Checkerboard() == Odd ) {
     this->DhopEO(psi,chi,DaggerNo); // Dslash on diagonal. g5 Dslash is hermitian
   } else {
     this->DhopOE(psi,chi,DaggerNo); // Dslash on diagonal. g5 Dslash is hermitian
diff --git a/lib/qcd/action/fermion/DomainWallEOFAFermioncache.cc b/lib/qcd/action/fermion/DomainWallEOFAFermioncache.cc
index be727d5f..c7a69fd0 100644
--- a/lib/qcd/action/fermion/DomainWallEOFAFermioncache.cc
+++ b/lib/qcd/action/fermion/DomainWallEOFAFermioncache.cc
@@ -46,29 +46,29 @@ void DomainWallEOFAFermion<Impl>::M5D(const FermionField& psi, const FermionFiel
   int Ls = this->Ls;
   GridBase* grid = psi._grid;
 
-  assert(phi.checkerboard == psi.checkerboard);
-  chi.checkerboard = psi.checkerboard;
+  assert(phi.Checkerboard() == psi.Checkerboard());
+  chi.Checkerboard() = psi.Checkerboard();
   // Flops = 6.0*(Nc*Ns) *Ls*vol
   this->M5Dcalls++;
   this->M5Dtime -= usecond();
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){ // adds Ls
     for(int s=0; s<Ls; s++){
-      auto tmp = psi._odata[0];
+      auto tmp = psi[0];
       if(s==0) {
-	spProj5m(tmp, psi._odata[ss+s+1]);
+	spProj5m(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5p(tmp, psi._odata[ss+Ls-1]);
+	spProj5p(tmp, psi[ss+Ls-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else if(s==(Ls-1)) {
-	spProj5m(tmp, psi._odata[ss+0]);
+	spProj5m(tmp, psi[ss+0]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5p(tmp, psi._odata[ss+s-1]);
+	spProj5p(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else {
-	spProj5m(tmp, psi._odata[ss+s+1]);
+	spProj5m(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5p(tmp, psi._odata[ss+s-1]);
+	spProj5p(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       }
     }
@@ -83,30 +83,30 @@ void DomainWallEOFAFermion<Impl>::M5Ddag(const FermionField& psi, const FermionF
 {
   int Ls = this->Ls;
   GridBase* grid = psi._grid;
-  assert(phi.checkerboard == psi.checkerboard);
-  chi.checkerboard=psi.checkerboard;
+  assert(phi.Checkerboard() == psi.Checkerboard());
+  chi.Checkerboard()=psi.Checkerboard();
 
   // Flops = 6.0*(Nc*Ns) *Ls*vol
   this->M5Dcalls++;
   this->M5Dtime -= usecond();
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){ // adds Ls
-    auto tmp = psi._odata[0];
+    auto tmp = psi[0];
     for(int s=0; s<Ls; s++){
       if(s==0) {
-	spProj5p(tmp, psi._odata[ss+s+1]);
+	spProj5p(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5m(tmp, psi._odata[ss+Ls-1]);
+	spProj5m(tmp, psi[ss+Ls-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else if(s==(Ls-1)) {
-	spProj5p(tmp, psi._odata[ss+0]);
+	spProj5p(tmp, psi[ss+0]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5m(tmp, psi._odata[ss+s-1]);
+	spProj5m(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else {
-	spProj5p(tmp, psi._odata[ss+s+1]);
+	spProj5p(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5m(tmp, psi._odata[ss+s-1]);
+	spProj5m(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       }
     }
@@ -121,15 +121,15 @@ void DomainWallEOFAFermion<Impl>::MooeeInv(const FermionField& psi, FermionField
   GridBase* grid = psi._grid;
   int Ls = this->Ls;
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   this->MooeeInvCalls++;
   this->MooeeInvTime -= usecond();
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){ // adds Ls
 
-    auto tmp1 = psi._odata[0];
-    auto tmp2 = psi._odata[0];
+    auto tmp1 = psi[0];
+    auto tmp2 = psi[0];
 
     // flops = 12*2*Ls + 12*2*Ls + 3*12*Ls + 12*2*Ls  = 12*Ls * (9) = 108*Ls flops
     // Apply (L^{\prime})^{-1}
@@ -169,8 +169,8 @@ void DomainWallEOFAFermion<Impl>::MooeeInvDag(const FermionField& psi, FermionFi
   GridBase* grid = psi._grid;
   int Ls = this->Ls;
 
-  assert(psi.checkerboard == psi.checkerboard);
-  chi.checkerboard = psi.checkerboard;
+  assert(psi.Checkerboard() == psi.Checkerboard());
+  chi.Checkerboard() = psi.Checkerboard();
 
   std::vector<Coeff_t> ueec(Ls);
   std::vector<Coeff_t> deec(Ls+1);
@@ -192,8 +192,8 @@ void DomainWallEOFAFermion<Impl>::MooeeInvDag(const FermionField& psi, FermionFi
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){ // adds Ls
 
-    auto tmp1 = psi._odata[0];
-    auto tmp2 = psi._odata[0];
+    auto tmp1 = psi[0];
+    auto tmp2 = psi[0];
 
     // Apply (U^{\prime})^{-dagger}
     chi[ss] = psi[ss];
diff --git a/lib/qcd/action/fermion/DomainWallEOFAFermiondense.cc b/lib/qcd/action/fermion/DomainWallEOFAFermiondense.cc
index 5c269c86..0a3a30a3 100644
--- a/lib/qcd/action/fermion/DomainWallEOFAFermiondense.cc
+++ b/lib/qcd/action/fermion/DomainWallEOFAFermiondense.cc
@@ -58,7 +58,7 @@ void DomainWallEOFAFermion<Impl>::MooeeInternal(const FermionField& psi, Fermion
   int LLs = psi._grid->_rdimensions[0];
   int vol = psi._grid->oSites()/LLs;
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   assert(Ls==LLs);
 
diff --git a/lib/qcd/action/fermion/DomainWallEOFAFermionssp.cc b/lib/qcd/action/fermion/DomainWallEOFAFermionssp.cc
index f49eb2aa..5e7b9d29 100644
--- a/lib/qcd/action/fermion/DomainWallEOFAFermionssp.cc
+++ b/lib/qcd/action/fermion/DomainWallEOFAFermionssp.cc
@@ -83,7 +83,7 @@ void DomainWallEOFAFermion<Impl>::MooeeInv(const FermionField& psi, FermionField
 {
   Coeff_t one(1.0);
   Coeff_t czero(0.0);
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
   int Ls = this->Ls;
 
   FermionField tmp(psi._grid);
@@ -117,7 +117,7 @@ void DomainWallEOFAFermion<Impl>::MooeeInvDag(const FermionField& psi, FermionFi
 {
   Coeff_t one(1.0);
   Coeff_t czero(0.0);
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
   int Ls = this->Ls;
 
   FermionField tmp(psi._grid);
diff --git a/lib/qcd/action/fermion/DomainWallEOFAFermionvec.cc b/lib/qcd/action/fermion/DomainWallEOFAFermionvec.cc
index 832cd449..6f3ad049 100644
--- a/lib/qcd/action/fermion/DomainWallEOFAFermionvec.cc
+++ b/lib/qcd/action/fermion/DomainWallEOFAFermionvec.cc
@@ -65,9 +65,9 @@ void DomainWallEOFAFermion<Impl>::M5D(const FermionField& psi, const FermionFiel
   Vector<iSinglet<Simd> > d(LLs);
 
   assert(Ls/LLs == nsimd);
-  assert(phi.checkerboard == psi.checkerboard);
+  assert(phi.Checkerboard() == psi.Checkerboard());
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   // just directly address via type pun
   typedef typename Simd::scalar_type scalar_type;
@@ -210,9 +210,9 @@ void DomainWallEOFAFermion<Impl>::M5Ddag(const FermionField& psi, const FermionF
   Vector<iSinglet<Simd> > d(LLs);
 
   assert(Ls/LLs == nsimd);
-  assert(phi.checkerboard == psi.checkerboard);
+  assert(phi.Checkerboard() == psi.Checkerboard());
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   // just directly address via type pun
   typedef typename Simd::scalar_type scalar_type;
@@ -536,7 +536,7 @@ void DomainWallEOFAFermion<Impl>::MooeeInternal(const FermionField& psi, Fermion
   int LLs = psi._grid->_rdimensions[0];
   int vol = psi._grid->oSites()/LLs;
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   Vector<iSinglet<Simd> > Matp;
   Vector<iSinglet<Simd> > Matm;
diff --git a/lib/qcd/action/fermion/FermionOperatorImpl.h b/lib/qcd/action/fermion/FermionOperatorImpl.h
index dac5cb4e..7b36e41e 100644
--- a/lib/qcd/action/fermion/FermionOperatorImpl.h
+++ b/lib/qcd/action/fermion/FermionOperatorImpl.h
@@ -432,7 +432,7 @@ public:
       // sum across the 5d dimension
       for (auto v : vres) scalar_object += v;  
       }
-      tmp._odata[so].putlane(scalar_object, si);
+      tmp[so].putlane(scalar_object, si);
       }
       }
       PokeIndex<LorentzIndex>(mat, tmp, mu);
diff --git a/lib/qcd/action/fermion/ImprovedStaggeredFermion.cc b/lib/qcd/action/fermion/ImprovedStaggeredFermion.cc
index 8e1dd3f7..1cc69559 100644
--- a/lib/qcd/action/fermion/ImprovedStaggeredFermion.cc
+++ b/lib/qcd/action/fermion/ImprovedStaggeredFermion.cc
@@ -171,21 +171,21 @@ void ImprovedStaggeredFermion<Impl>::ImportGauge(const GaugeField &_Uthin,const
 
 template <class Impl>
 RealD ImprovedStaggeredFermion<Impl>::M(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   Dhop(in, out, DaggerNo);
   return axpy_norm(out, mass, in, out);
 }
 
 template <class Impl>
 RealD ImprovedStaggeredFermion<Impl>::Mdag(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   Dhop(in, out, DaggerYes);
   return axpy_norm(out, mass, in, out);
 }
 
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::Meooe(const FermionField &in, FermionField &out) {
-  if (in.checkerboard == Odd) {
+  if (in.Checkerboard() == Odd) {
     DhopEO(in, out, DaggerNo);
   } else {
     DhopOE(in, out, DaggerNo);
@@ -193,7 +193,7 @@ void ImprovedStaggeredFermion<Impl>::Meooe(const FermionField &in, FermionField
 }
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::MeooeDag(const FermionField &in, FermionField &out) {
-  if (in.checkerboard == Odd) {
+  if (in.Checkerboard() == Odd) {
     DhopEO(in, out, DaggerYes);
   } else {
     DhopOE(in, out, DaggerYes);
@@ -202,27 +202,27 @@ void ImprovedStaggeredFermion<Impl>::MeooeDag(const FermionField &in, FermionFie
 
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::Mooee(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   typename FermionField::scalar_type scal(mass);
   out = scal * in;
 }
 
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::MooeeDag(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   Mooee(in, out);
 }
 
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::MooeeInv(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   out = (1.0 / (mass)) * in;
 }
 
 template <class Impl>
 void ImprovedStaggeredFermion<Impl>::MooeeInvDag(const FermionField &in,
 						 FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   MooeeInv(in, out);
 }
 
@@ -285,7 +285,7 @@ void ImprovedStaggeredFermion<Impl>::DhopDeriv(GaugeField &mat, const FermionFie
   conformable(U._grid, V._grid);
   conformable(U._grid, mat._grid);
 
-  mat.checkerboard = U.checkerboard;
+  mat.Checkerboard() = U.Checkerboard();
 
   DerivInternal(Stencil, Umu, UUUmu, mat, U, V, dag);
 }
@@ -297,9 +297,9 @@ void ImprovedStaggeredFermion<Impl>::DhopDerivOE(GaugeField &mat, const FermionF
   conformable(U._grid, V._grid);
   conformable(U._grid, mat._grid);
 
-  assert(V.checkerboard == Even);
-  assert(U.checkerboard == Odd);
-  mat.checkerboard = Odd;
+  assert(V.Checkerboard() == Even);
+  assert(U.Checkerboard() == Odd);
+  mat.Checkerboard() = Odd;
 
   DerivInternal(StencilEven, UmuOdd, UUUmuOdd, mat, U, V, dag);
 }
@@ -311,9 +311,9 @@ void ImprovedStaggeredFermion<Impl>::DhopDerivEO(GaugeField &mat, const FermionF
   conformable(U._grid, V._grid);
   conformable(U._grid, mat._grid);
 
-  assert(V.checkerboard == Odd);
-  assert(U.checkerboard == Even);
-  mat.checkerboard = Even;
+  assert(V.Checkerboard() == Odd);
+  assert(U.Checkerboard() == Even);
+  mat.Checkerboard() = Even;
 
   DerivInternal(StencilOdd, UmuEven, UUUmuEven, mat, U, V, dag);
 }
@@ -323,7 +323,7 @@ void ImprovedStaggeredFermion<Impl>::Dhop(const FermionField &in, FermionField &
   conformable(in._grid, _grid);  // verifies full grid
   conformable(in._grid, out._grid);
 
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
 
   DhopInternal(Stencil, Lebesgue, Umu, UUUmu, in, out, dag);
 }
@@ -333,8 +333,8 @@ void ImprovedStaggeredFermion<Impl>::DhopOE(const FermionField &in, FermionField
   conformable(in._grid, _cbgrid);    // verifies half grid
   conformable(in._grid, out._grid);  // drops the cb check
 
-  assert(in.checkerboard == Even);
-  out.checkerboard = Odd;
+  assert(in.Checkerboard() == Even);
+  out.Checkerboard() = Odd;
 
   DhopInternal(StencilEven, LebesgueEvenOdd, UmuOdd, UUUmuOdd, in, out, dag);
 }
@@ -344,8 +344,8 @@ void ImprovedStaggeredFermion<Impl>::DhopEO(const FermionField &in, FermionField
   conformable(in._grid, _cbgrid);    // verifies half grid
   conformable(in._grid, out._grid);  // drops the cb check
 
-  assert(in.checkerboard == Odd);
-  out.checkerboard = Even;
+  assert(in.Checkerboard() == Odd);
+  out.Checkerboard() = Even;
 
   DhopInternal(StencilOdd, LebesgueEvenOdd, UmuEven, UUUmuEven, in, out, dag);
 }
diff --git a/lib/qcd/action/fermion/ImprovedStaggeredFermion5D.cc b/lib/qcd/action/fermion/ImprovedStaggeredFermion5D.cc
index b0d65be6..b8048723 100644
--- a/lib/qcd/action/fermion/ImprovedStaggeredFermion5D.cc
+++ b/lib/qcd/action/fermion/ImprovedStaggeredFermion5D.cc
@@ -262,8 +262,8 @@ void ImprovedStaggeredFermion5D<Impl>::DhopOE(const FermionField &in, FermionFie
   conformable(in._grid,FermionRedBlackGrid());    // verifies half grid
   conformable(in._grid,out._grid); // drops the cb check
 
-  assert(in.checkerboard==Even);
-  out.checkerboard = Odd;
+  assert(in.Checkerboard()==Even);
+  out.Checkerboard() = Odd;
 
   DhopInternal(StencilEven,LebesgueEvenOdd,UmuOdd,UUUmuOdd,in,out,dag);
 }
@@ -274,8 +274,8 @@ void ImprovedStaggeredFermion5D<Impl>::DhopEO(const FermionField &in, FermionFie
   conformable(in._grid,FermionRedBlackGrid());    // verifies half grid
   conformable(in._grid,out._grid); // drops the cb check
 
-  assert(in.checkerboard==Odd);
-  out.checkerboard = Even;
+  assert(in.Checkerboard()==Odd);
+  out.Checkerboard() = Even;
 
   DhopInternal(StencilOdd,LebesgueEvenOdd,UmuEven,UUUmuEven,in,out,dag);
 }
@@ -286,7 +286,7 @@ void ImprovedStaggeredFermion5D<Impl>::Dhop(const FermionField &in, FermionField
   conformable(in._grid,FermionGrid()); // verifies full grid
   conformable(in._grid,out._grid);
 
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
 
   DhopInternal(Stencil,Lebesgue,Umu,UUUmu,in,out,dag);
 }
@@ -349,21 +349,21 @@ void ImprovedStaggeredFermion5D<Impl>::Mdir(const FermionField &in, FermionField
 }
 template <class Impl>
 RealD ImprovedStaggeredFermion5D<Impl>::M(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   Dhop(in, out, DaggerNo);
   return axpy_norm(out, mass, in, out);
 }
 
 template <class Impl>
 RealD ImprovedStaggeredFermion5D<Impl>::Mdag(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   Dhop(in, out, DaggerYes);
   return axpy_norm(out, mass, in, out);
 }
 
 template <class Impl>
 void ImprovedStaggeredFermion5D<Impl>::Meooe(const FermionField &in, FermionField &out) {
-  if (in.checkerboard == Odd) {
+  if (in.Checkerboard() == Odd) {
     DhopEO(in, out, DaggerNo);
   } else {
     DhopOE(in, out, DaggerNo);
@@ -371,7 +371,7 @@ void ImprovedStaggeredFermion5D<Impl>::Meooe(const FermionField &in, FermionFiel
 }
 template <class Impl>
 void ImprovedStaggeredFermion5D<Impl>::MeooeDag(const FermionField &in, FermionField &out) {
-  if (in.checkerboard == Odd) {
+  if (in.Checkerboard() == Odd) {
     DhopEO(in, out, DaggerYes);
   } else {
     DhopOE(in, out, DaggerYes);
@@ -380,27 +380,27 @@ void ImprovedStaggeredFermion5D<Impl>::MeooeDag(const FermionField &in, FermionF
 
 template <class Impl>
 void ImprovedStaggeredFermion5D<Impl>::Mooee(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   typename FermionField::scalar_type scal(mass);
   out = scal * in;
 }
 
 template <class Impl>
 void ImprovedStaggeredFermion5D<Impl>::MooeeDag(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   Mooee(in, out);
 }
 
 template <class Impl>
 void ImprovedStaggeredFermion5D<Impl>::MooeeInv(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   out = (1.0 / (mass)) * in;
 }
 
 template <class Impl>
 void ImprovedStaggeredFermion5D<Impl>::MooeeInvDag(const FermionField &in,
 						   FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   MooeeInv(in, out);
 }
 
diff --git a/lib/qcd/action/fermion/MobiusEOFAFermioncache.cc b/lib/qcd/action/fermion/MobiusEOFAFermioncache.cc
index a1a9eb86..e3fcc8a7 100644
--- a/lib/qcd/action/fermion/MobiusEOFAFermioncache.cc
+++ b/lib/qcd/action/fermion/MobiusEOFAFermioncache.cc
@@ -43,8 +43,8 @@ void MobiusEOFAFermion<Impl>::M5D(const FermionField &psi, const FermionField &p
   int Ls = this->Ls;
   GridBase *grid = psi._grid;
 
-  assert(phi.checkerboard == psi.checkerboard);
-  chi.checkerboard = psi.checkerboard;
+  assert(phi.Checkerboard() == psi.Checkerboard());
+  chi.Checkerboard() = psi.Checkerboard();
 
   // Flops = 6.0*(Nc*Ns) *Ls*vol
   this->M5Dcalls++;
@@ -52,21 +52,21 @@ void MobiusEOFAFermion<Impl>::M5D(const FermionField &psi, const FermionField &p
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){
     for(int s=0; s<Ls; s++){
-      auto tmp = psi._odata[0];
+      auto tmp = psi[0];
       if(s==0){
-	spProj5m(tmp, psi._odata[ss+s+1]);
+	spProj5m(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5p(tmp, psi._odata[ss+Ls-1]);
+	spProj5p(tmp, psi[ss+Ls-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else if(s==(Ls-1)) {
-	spProj5m(tmp, psi._odata[ss+0]);
+	spProj5m(tmp, psi[ss+0]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5p(tmp, psi._odata[ss+s-1]);
+	spProj5p(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else {
-	spProj5m(tmp, psi._odata[ss+s+1]);
+	spProj5m(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5p(tmp, psi._odata[ss+s-1]);
+	spProj5p(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       }
     }
@@ -84,8 +84,8 @@ void MobiusEOFAFermion<Impl>::M5D_shift(const FermionField &psi, const FermionFi
   int shift_s = (this->pm == 1) ? (Ls-1) : 0; // s-component modified by shift operator
   GridBase *grid = psi._grid;
 
-  assert(phi.checkerboard == psi.checkerboard);
-  chi.checkerboard = psi.checkerboard;
+  assert(phi.Checkerboard() == psi.Checkerboard());
+  chi.Checkerboard() = psi.Checkerboard();
 
   // Flops = 6.0*(Nc*Ns) *Ls*vol
   this->M5Dcalls++;
@@ -93,25 +93,25 @@ void MobiusEOFAFermion<Impl>::M5D_shift(const FermionField &psi, const FermionFi
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){
     for(int s=0; s<Ls; s++){
-      auto tmp = psi._odata[0];
+      auto tmp = psi[0];
       if(s==0){
-	spProj5m(tmp, psi._odata[ss+s+1]);
+	spProj5m(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5p(tmp, psi._odata[ss+Ls-1]);
+	spProj5p(tmp, psi[ss+Ls-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else if(s==(Ls-1)) {
-	spProj5m(tmp, psi._odata[ss+0]);
+	spProj5m(tmp, psi[ss+0]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5p(tmp, psi._odata[ss+s-1]);
+	spProj5p(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else {
-	spProj5m(tmp, psi._odata[ss+s+1]);
+	spProj5m(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5p(tmp, psi._odata[ss+s-1]);
+	spProj5p(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       }
-      if(this->pm == 1){ spProj5p(tmp, psi._odata[ss+shift_s]); }
-      else{ spProj5m(tmp, psi._odata[ss+shift_s]); }
+      if(this->pm == 1){ spProj5p(tmp, psi[ss+shift_s]); }
+      else{ spProj5m(tmp, psi[ss+shift_s]); }
       chi[ss+s] = chi[ss+s] + shift_coeffs[s]*tmp;
     }
   }
@@ -126,30 +126,30 @@ void MobiusEOFAFermion<Impl>::M5Ddag(const FermionField &psi, const FermionField
   int Ls = this->Ls;
   GridBase *grid = psi._grid;
 
-  assert(phi.checkerboard == psi.checkerboard);
-  chi.checkerboard = psi.checkerboard;
+  assert(phi.Checkerboard() == psi.Checkerboard());
+  chi.Checkerboard() = psi.Checkerboard();
 
   // Flops = 6.0*(Nc*Ns) *Ls*vol
   this->M5Dcalls++;
   this->M5Dtime -= usecond();
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){
-    auto tmp = psi._odata[0];
+    auto tmp = psi[0];
     for(int s=0; s<Ls; s++){
       if(s==0) {
-	spProj5p(tmp, psi._odata[ss+s+1]);
+	spProj5p(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5m(tmp, psi._odata[ss+Ls-1]);
+	spProj5m(tmp, psi[ss+Ls-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else if(s==(Ls-1)) {
-	spProj5p(tmp, psi._odata[ss+0]);
+	spProj5p(tmp, psi[ss+0]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5m(tmp, psi._odata[ss+s-1]);
+	spProj5m(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else {
-	spProj5p(tmp, psi._odata[ss+s+1]);
+	spProj5p(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5m(tmp, psi._odata[ss+s-1]);
+	spProj5m(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       }
     }
@@ -167,8 +167,8 @@ void MobiusEOFAFermion<Impl>::M5Ddag_shift(const FermionField &psi, const Fermio
   int shift_s = (this->pm == 1) ? (Ls-1) : 0; // s-component modified by shift operator
   GridBase *grid = psi._grid;
 
-  assert(phi.checkerboard == psi.checkerboard);
-  chi.checkerboard = psi.checkerboard;
+  assert(phi.Checkerboard() == psi.Checkerboard());
+  chi.Checkerboard() = psi.Checkerboard();
 
   // Flops = 6.0*(Nc*Ns) *Ls*vol
   this->M5Dcalls++;
@@ -176,26 +176,26 @@ void MobiusEOFAFermion<Impl>::M5Ddag_shift(const FermionField &psi, const Fermio
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){
     chi[ss+Ls-1] = zero;
-    auto tmp = psi._odata[0];
+    auto tmp = psi[0];
     for(int s=0; s<Ls; s++){
       if(s==0) {
-	spProj5p(tmp, psi._odata[ss+s+1]);
+	spProj5p(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5m(tmp, psi._odata[ss+Ls-1]);
+	spProj5m(tmp, psi[ss+Ls-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else if(s==(Ls-1)) {
-	spProj5p(tmp, psi._odata[ss+0]);
+	spProj5p(tmp, psi[ss+0]);
 	chi[ss+s] = chi[ss+s] + diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5m(tmp, psi._odata[ss+s-1]);
+	spProj5m(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       } else {
-	spProj5p(tmp, psi._odata[ss+s+1]);
+	spProj5p(tmp, psi[ss+s+1]);
 	chi[ss+s] = diag[s]*phi[ss+s] + upper[s]*tmp;
-	spProj5m(tmp, psi._odata[ss+s-1]);
+	spProj5m(tmp, psi[ss+s-1]);
 	chi[ss+s] = chi[ss+s] + lower[s]*tmp;
       }
-      if(this->pm == 1){ spProj5p(tmp, psi._odata[ss+s]); }
-      else{ spProj5m(tmp, psi._odata[ss+s]); }
+      if(this->pm == 1){ spProj5p(tmp, psi[ss+s]); }
+      else{ spProj5m(tmp, psi[ss+s]); }
       chi[ss+shift_s] = chi[ss+shift_s] + shift_coeffs[s]*tmp;
     }
   }
@@ -211,14 +211,14 @@ void MobiusEOFAFermion<Impl>::MooeeInv(const FermionField &psi, FermionField &ch
   GridBase *grid = psi._grid;
   int Ls = this->Ls;
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   this->MooeeInvCalls++;
   this->MooeeInvTime -= usecond();
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){
 
-    auto tmp = psi._odata[0];
+    auto tmp = psi[0];
 
     // Apply (L^{\prime})^{-1}
     chi[ss] = psi[ss]; // chi[0]=psi[0]
@@ -256,16 +256,16 @@ void MobiusEOFAFermion<Impl>::MooeeInv_shift(const FermionField &psi, FermionFie
   GridBase *grid = psi._grid;
   int Ls = this->Ls;
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   this->MooeeInvCalls++;
   this->MooeeInvTime -= usecond();
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){
 
-    auto tmp1        = psi._odata[0];
-    auto tmp2        = psi._odata[0];
-    auto tmp2_spProj = psi._odata[0];
+    auto tmp1        = psi[0];
+    auto tmp2        = psi[0];
+    auto tmp2_spProj = psi[0];
 
     // Apply (L^{\prime})^{-1} and accumulate MooeeInv_shift_lc[j]*psi[j] in tmp2
     chi[ss] = psi[ss]; // chi[0]=psi[0]
@@ -313,14 +313,14 @@ void MobiusEOFAFermion<Impl>::MooeeInvDag(const FermionField &psi, FermionField
   GridBase *grid = psi._grid;
   int Ls = this->Ls;
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   this->MooeeInvCalls++;
   this->MooeeInvTime -= usecond();
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){
 
-    auto tmp = psi._odata[0];
+    auto tmp = psi[0];
 
     // Apply (U^{\prime})^{-dag}
     chi[ss] = psi[ss];
@@ -358,16 +358,16 @@ void MobiusEOFAFermion<Impl>::MooeeInvDag_shift(const FermionField &psi, Fermion
   GridBase *grid = psi._grid;
   int Ls = this->Ls;
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   this->MooeeInvCalls++;
   this->MooeeInvTime -= usecond();
 
   parallel_for(int ss=0; ss<grid->oSites(); ss+=Ls){
 
-    auto tmp1        = psi._odata[0];
-    auto tmp2        = psi._odata[0];
-    auto tmp2_spProj = psi._odata[0];
+    auto tmp1        = psi[0];
+    auto tmp2        = psi[0];
+    auto tmp2_spProj = psi[0];
 
     // Apply (U^{\prime})^{-dag} and accumulate MooeeInvDag_shift_lc[j]*psi[j] in tmp2
     chi[ss] = psi[ss];
diff --git a/lib/qcd/action/fermion/MobiusEOFAFermiondense.cc b/lib/qcd/action/fermion/MobiusEOFAFermiondense.cc
index bbf06585..bdd5be1d 100644
--- a/lib/qcd/action/fermion/MobiusEOFAFermiondense.cc
+++ b/lib/qcd/action/fermion/MobiusEOFAFermiondense.cc
@@ -76,7 +76,7 @@ void MobiusEOFAFermion<Impl>::MooeeInternal(const FermionField& psi, FermionFiel
   RealD k     = this->k;
   RealD mq1   = this->mq1;
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   assert(Ls==LLs);
 
diff --git a/lib/qcd/action/fermion/MobiusEOFAFermionssp.cc b/lib/qcd/action/fermion/MobiusEOFAFermionssp.cc
index 7a6f44e9..29dccf9a 100644
--- a/lib/qcd/action/fermion/MobiusEOFAFermionssp.cc
+++ b/lib/qcd/action/fermion/MobiusEOFAFermionssp.cc
@@ -131,7 +131,7 @@ void MobiusEOFAFermion<Impl>::MooeeInv(const FermionField& psi, FermionField& ch
 
   Coeff_t one(1.0);
   Coeff_t czero(0.0);
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
   int Ls = this->Ls;
 
   // Apply (L^{\prime})^{-1}
@@ -162,7 +162,7 @@ void MobiusEOFAFermion<Impl>::MooeeInv_shift(const FermionField& psi, FermionFie
 {
   Coeff_t one(1.0);
   Coeff_t czero(0.0);
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
   int Ls = this->Ls;
 
   FermionField tmp(psi._grid);
@@ -203,7 +203,7 @@ void MobiusEOFAFermion<Impl>::MooeeInvDag(const FermionField& psi, FermionField&
 
   Coeff_t one(1.0);
   Coeff_t czero(0.0);
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
   int Ls = this->Ls;
 
   // Apply (U^{\prime})^{-dagger}
@@ -234,7 +234,7 @@ void MobiusEOFAFermion<Impl>::MooeeInvDag_shift(const FermionField& psi, Fermion
 {
   Coeff_t one(1.0);
   Coeff_t czero(0.0);
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
   int Ls = this->Ls;
 
   FermionField tmp(psi._grid);
diff --git a/lib/qcd/action/fermion/MobiusEOFAFermionvec.cc b/lib/qcd/action/fermion/MobiusEOFAFermionvec.cc
index 03808b02..38cd4853 100644
--- a/lib/qcd/action/fermion/MobiusEOFAFermionvec.cc
+++ b/lib/qcd/action/fermion/MobiusEOFAFermionvec.cc
@@ -76,9 +76,9 @@ void MobiusEOFAFermion<Impl>::M5D(const FermionField& psi, const FermionField& p
   Vector<iSinglet<Simd>> d(LLs);
 
   assert(Ls/LLs == nsimd);
-  assert(phi.checkerboard == psi.checkerboard);
+  assert(phi.Checkerboard() == psi.Checkerboard());
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   // just directly address via type pun
   typedef typename Simd::scalar_type scalar_type;
@@ -237,9 +237,9 @@ void MobiusEOFAFermion<Impl>::M5D_shift(const FermionField& psi, const FermionFi
   Vector<iSinglet<Simd>> s(LLs);
 
   assert(Ls/LLs == nsimd);
-  assert(phi.checkerboard == psi.checkerboard);
+  assert(phi.Checkerboard() == psi.Checkerboard());
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   // just directly address via type pun
   typedef typename Simd::scalar_type scalar_type;
@@ -402,9 +402,9 @@ void MobiusEOFAFermion<Impl>::M5Ddag(const FermionField& psi, const FermionField
   Vector<iSinglet<Simd>> d(LLs);
 
   assert(Ls/LLs == nsimd);
-  assert(phi.checkerboard == psi.checkerboard);
+  assert(phi.Checkerboard() == psi.Checkerboard());
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   // just directly address via type pun
   typedef typename Simd::scalar_type scalar_type;
@@ -560,9 +560,9 @@ void MobiusEOFAFermion<Impl>::M5Ddag_shift(const FermionField& psi, const Fermio
   Vector<iSinglet<Simd>> s(LLs);
 
   assert(Ls/LLs == nsimd);
-  assert(phi.checkerboard == psi.checkerboard);
+  assert(phi.Checkerboard() == psi.Checkerboard());
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   // just directly address via type pun
   typedef typename Simd::scalar_type scalar_type;
@@ -913,7 +913,7 @@ void MobiusEOFAFermion<Impl>::MooeeInternal(const FermionField& psi, FermionFiel
   int LLs = psi._grid->_rdimensions[0];
   int vol = psi._grid->oSites()/LLs;
 
-  chi.checkerboard = psi.checkerboard;
+  chi.Checkerboard() = psi.Checkerboard();
 
   Vector<iSinglet<Simd>>   Matp;
   Vector<iSinglet<Simd>>   Matm;
diff --git a/lib/qcd/action/fermion/PartialFractionFermion5D.cc b/lib/qcd/action/fermion/PartialFractionFermion5D.cc
index 1ba8a788..2faf2adf 100644
--- a/lib/qcd/action/fermion/PartialFractionFermion5D.cc
+++ b/lib/qcd/action/fermion/PartialFractionFermion5D.cc
@@ -51,7 +51,7 @@ template<class Impl>
 void   PartialFractionFermion5D<Impl>::Meooe_internal(const FermionField &psi, FermionField &chi,int dag)
 {
   int Ls = this->Ls;
-  if ( psi.checkerboard == Odd ) {
+  if ( psi.Checkerboard() == Odd ) {
     this->DhopEO(psi,chi,DaggerNo);
   } else {
     this->DhopOE(psi,chi,DaggerNo);
diff --git a/lib/qcd/action/fermion/SchurDiagTwoKappa.h b/lib/qcd/action/fermion/SchurDiagTwoKappa.h
index a0026f57..f24089e7 100644
--- a/lib/qcd/action/fermion/SchurDiagTwoKappa.h
+++ b/lib/qcd/action/fermion/SchurDiagTwoKappa.h
@@ -51,12 +51,12 @@ public:
   template<typename vobj>
   void sscale(const Lattice<vobj>& in, Lattice<vobj>& out, Coeff_t* s) {
     GridBase *grid=out._grid;
-    out.checkerboard = in.checkerboard;
+    out.Checkerboard() = in.Checkerboard();
     assert(grid->_simd_layout[0] == 1); // should be fine for ZMobius for now
     int Ls = grid->_rdimensions[0];
     parallel_for(int ss=0;ss<grid->oSites();ss++){
-      vobj tmp = s[ss % Ls]*in._odata[ss];
-      vstream(out._odata[ss],tmp);
+      vobj tmp = s[ss % Ls]*in[ss];
+      vstream(out[ss],tmp);
     }
   }
 
diff --git a/lib/qcd/action/fermion/StaggeredKernels.cc b/lib/qcd/action/fermion/StaggeredKernels.cc
index 29732ec7..832a3066 100644
--- a/lib/qcd/action/fermion/StaggeredKernels.cc
+++ b/lib/qcd/action/fermion/StaggeredKernels.cc
@@ -58,14 +58,14 @@ void StaggeredKernels<Impl>::DhopSiteDepth(StencilImpl &st, LebesgueOrder &lo, D
   if (SE->_is_local) {
     if (SE->_permute) {
       chi_p = &chi;
-      permute(chi,  in._odata[SE->_offset], ptype);
+      permute(chi,  in[SE->_offset], ptype);
     } else {
-      chi_p = &in._odata[SE->_offset];
+      chi_p = &in[SE->_offset];
     }
   } else {
     chi_p = &buf[SE->_offset];
   }
-  Impl::multLink(Uchi, U._odata[sU], *chi_p, Xp);
+  Impl::multLink(Uchi, U[sU], *chi_p, Xp);
 
   ///////////////////////////
   // Yp
@@ -74,14 +74,14 @@ void StaggeredKernels<Impl>::DhopSiteDepth(StencilImpl &st, LebesgueOrder &lo, D
   if (SE->_is_local) {
     if (SE->_permute) {
       chi_p = &chi;
-      permute(chi,  in._odata[SE->_offset], ptype);
+      permute(chi,  in[SE->_offset], ptype);
     } else {
-      chi_p = &in._odata[SE->_offset];
+      chi_p = &in[SE->_offset];
     }
   } else {
     chi_p = &buf[SE->_offset];
   }
-  Impl::multLinkAdd(Uchi, U._odata[sU], *chi_p, Yp);
+  Impl::multLinkAdd(Uchi, U[sU], *chi_p, Yp);
 
   ///////////////////////////
   // Zp
@@ -90,14 +90,14 @@ void StaggeredKernels<Impl>::DhopSiteDepth(StencilImpl &st, LebesgueOrder &lo, D
   if (SE->_is_local) {
     if (SE->_permute) {
       chi_p = &chi;
-      permute(chi,  in._odata[SE->_offset], ptype);
+      permute(chi,  in[SE->_offset], ptype);
     } else {
-      chi_p = &in._odata[SE->_offset];
+      chi_p = &in[SE->_offset];
     }
   } else {
     chi_p = &buf[SE->_offset];
   }
-  Impl::multLinkAdd(Uchi, U._odata[sU], *chi_p, Zp);
+  Impl::multLinkAdd(Uchi, U[sU], *chi_p, Zp);
 
   ///////////////////////////
   // Tp
@@ -106,14 +106,14 @@ void StaggeredKernels<Impl>::DhopSiteDepth(StencilImpl &st, LebesgueOrder &lo, D
   if (SE->_is_local) {
     if (SE->_permute) {
       chi_p = &chi;
-      permute(chi,  in._odata[SE->_offset], ptype);
+      permute(chi,  in[SE->_offset], ptype);
     } else {
-      chi_p = &in._odata[SE->_offset];
+      chi_p = &in[SE->_offset];
     }
   } else {
     chi_p = &buf[SE->_offset];
   }
-  Impl::multLinkAdd(Uchi, U._odata[sU], *chi_p, Tp);
+  Impl::multLinkAdd(Uchi, U[sU], *chi_p, Tp);
 
   ///////////////////////////
   // Xm
@@ -122,14 +122,14 @@ void StaggeredKernels<Impl>::DhopSiteDepth(StencilImpl &st, LebesgueOrder &lo, D
   if (SE->_is_local) {
     if (SE->_permute) {
       chi_p = &chi;
-      permute(chi,  in._odata[SE->_offset], ptype);
+      permute(chi,  in[SE->_offset], ptype);
     } else {
-      chi_p = &in._odata[SE->_offset];
+      chi_p = &in[SE->_offset];
     }
   } else {
     chi_p = &buf[SE->_offset];
   }
-  Impl::multLinkAdd(Uchi, U._odata[sU], *chi_p, Xm);
+  Impl::multLinkAdd(Uchi, U[sU], *chi_p, Xm);
 
   ///////////////////////////
   // Ym
@@ -138,14 +138,14 @@ void StaggeredKernels<Impl>::DhopSiteDepth(StencilImpl &st, LebesgueOrder &lo, D
   if (SE->_is_local) {
     if (SE->_permute) {
       chi_p = &chi;
-      permute(chi,  in._odata[SE->_offset], ptype);
+      permute(chi,  in[SE->_offset], ptype);
     } else {
-      chi_p = &in._odata[SE->_offset];
+      chi_p = &in[SE->_offset];
     }
   } else {
     chi_p = &buf[SE->_offset];
   }
-  Impl::multLinkAdd(Uchi, U._odata[sU], *chi_p, Ym);
+  Impl::multLinkAdd(Uchi, U[sU], *chi_p, Ym);
 
   ///////////////////////////
   // Zm
@@ -154,14 +154,14 @@ void StaggeredKernels<Impl>::DhopSiteDepth(StencilImpl &st, LebesgueOrder &lo, D
   if (SE->_is_local) {
     if (SE->_permute) {
       chi_p = &chi;
-      permute(chi,  in._odata[SE->_offset], ptype);
+      permute(chi,  in[SE->_offset], ptype);
     } else {
-      chi_p = &in._odata[SE->_offset];
+      chi_p = &in[SE->_offset];
     }
   } else {
     chi_p = &buf[SE->_offset];
   }
-  Impl::multLinkAdd(Uchi, U._odata[sU], *chi_p, Zm);
+  Impl::multLinkAdd(Uchi, U[sU], *chi_p, Zm);
 
   ///////////////////////////
   // Tm
@@ -170,14 +170,14 @@ void StaggeredKernels<Impl>::DhopSiteDepth(StencilImpl &st, LebesgueOrder &lo, D
   if (SE->_is_local) {
     if (SE->_permute) {
       chi_p = &chi;
-      permute(chi,  in._odata[SE->_offset], ptype);
+      permute(chi,  in[SE->_offset], ptype);
     } else {
-      chi_p = &in._odata[SE->_offset];
+      chi_p = &in[SE->_offset];
     }
   } else {
     chi_p = &buf[SE->_offset];
   }
-  Impl::multLinkAdd(Uchi, U._odata[sU], *chi_p, Tm);
+  Impl::multLinkAdd(Uchi, U[sU], *chi_p, Tm);
 
   vstream(out, Uchi);
 };
@@ -198,7 +198,7 @@ void StaggeredKernels<Impl>::DhopSiteDag(StencilImpl &st, LebesgueOrder &lo, Dou
     DhopSiteAsm(st,lo,U,UUU,buf,LLs,sU,in,out);
     for(int s=0;s<LLs;s++) {
       int sF=s+LLs*sU;
-      out._odata[sF]=-out._odata[sF];
+      out[sF]=-out[sF];
     }
     break;
 #endif
@@ -210,7 +210,7 @@ void StaggeredKernels<Impl>::DhopSiteDag(StencilImpl &st, LebesgueOrder &lo, Dou
       int sF=s+LLs*sU;
       DhopSiteDepth(st,lo,U,buf,sF,sU,in,naive,oneLink);
       DhopSiteDepth(st,lo,UUU,buf,sF,sU,in,naik,threeLink);
-      out._odata[sF] =-naive-naik; 
+      out[sF] =-naive-naik; 
     }
     break;
   default:
@@ -247,7 +247,7 @@ void StaggeredKernels<Impl>::DhopSite(StencilImpl &st, LebesgueOrder &lo, Double
       //      assert(sF>=0);      assert(sU>=0);
       DhopSiteDepth(st,lo,U,buf,sF,sU,in,naive,oneLink);
       DhopSiteDepth(st,lo,UUU,buf,sF,sU,in,naik,threeLink);
-      out._odata[sF] =naive+naik;
+      out[sF] =naive+naik;
     }
     break;
   default:
diff --git a/lib/qcd/action/fermion/StaggeredKernelsAsm.cc b/lib/qcd/action/fermion/StaggeredKernelsAsm.cc
index 7a9ebc39..d7fa50c5 100644
--- a/lib/qcd/action/fermion/StaggeredKernelsAsm.cc
+++ b/lib/qcd/action/fermion/StaggeredKernelsAsm.cc
@@ -589,7 +589,7 @@ void StaggeredKernels<Impl>::DhopSiteAsm(StencilImpl &st, LebesgueOrder &lo,
 };
 
 
-//#define CONDITIONAL_MOVE(l,o,out) if ( l ) { out = (uint64_t) &in._odata[o] ; } else { out =(uint64_t) &buf[o]; }
+//#define CONDITIONAL_MOVE(l,o,out) if ( l ) { out = (uint64_t) &in[o] ; } else { out =(uint64_t) &buf[o]; }
 
 #define CONDITIONAL_MOVE(l,o,out) { const SiteSpinor *ptr = l? in_p : buf; out = (uint64_t) &ptr[o]; }
 
@@ -636,10 +636,10 @@ void StaggeredKernels<Impl>::DhopSiteAsm(StencilImpl &st, LebesgueOrder &lo,
   CONDITIONAL_MOVE(l3,o3,addr3);					\
   PF_CHI(addr3);							\
   									\
-  gauge0 =(uint64_t)&UU._odata[sU]( X );				\
-  gauge1 =(uint64_t)&UU._odata[sU]( Y );				\
-  gauge2 =(uint64_t)&UU._odata[sU]( Z );				\
-  gauge3 =(uint64_t)&UU._odata[sU]( T ); 
+  gauge0 =(uint64_t)&UU[sU]( X );				\
+  gauge1 =(uint64_t)&UU[sU]( Y );				\
+  gauge2 =(uint64_t)&UU[sU]( Z );				\
+  gauge3 =(uint64_t)&UU[sU]( T ); 
   
   // This is the single precision 5th direction vectorised kernel
 #include <simd/Intel512single.h>
@@ -652,7 +652,7 @@ template <> void StaggeredKernels<StaggeredVec5dImplF>::DhopSiteAsm(StencilImpl
 #ifdef AVX512
   uint64_t gauge0,gauge1,gauge2,gauge3;
   uint64_t addr0,addr1,addr2,addr3;
-  const SiteSpinor *in_p; in_p = &in._odata[0];
+  const SiteSpinor *in_p; in_p = &in[0];
 
   int o0,o1,o2,o3; // offsets
   int l0,l1,l2,l3; // local 
@@ -683,7 +683,7 @@ template <> void StaggeredKernels<StaggeredVec5dImplF>::DhopSiteAsm(StencilImpl
     LOAD_CHI(addr0,addr1,addr2,addr3);
     MULT_ADD_LS(gauge0,gauge1,gauge2,gauge3);
 
-    addr0 = (uint64_t) &out._odata[sF];
+    addr0 = (uint64_t) &out[sF];
     REDUCE(addr0);
    }
 #else 
@@ -702,7 +702,7 @@ template <> void StaggeredKernels<StaggeredVec5dImplD>::DhopSiteAsm(StencilImpl
 #ifdef AVX512
   uint64_t gauge0,gauge1,gauge2,gauge3;
   uint64_t addr0,addr1,addr2,addr3;
-  const SiteSpinor *in_p; in_p = &in._odata[0];
+  const SiteSpinor *in_p; in_p = &in[0];
 
   int o0,o1,o2,o3; // offsets
   int l0,l1,l2,l3; // local 
@@ -732,7 +732,7 @@ template <> void StaggeredKernels<StaggeredVec5dImplD>::DhopSiteAsm(StencilImpl
     LOAD_CHI(addr0,addr1,addr2,addr3);
     MULT_ADD_LS(gauge0,gauge1,gauge2,gauge3);
 
-    addr0 = (uint64_t) &out._odata[sF];
+    addr0 = (uint64_t) &out[sF];
     REDUCE(addr0);
   }
 #else 
@@ -783,7 +783,7 @@ template <> void StaggeredKernels<StaggeredImplF>::DhopSiteAsm(StencilImpl &st,
 #ifdef AVX512
   uint64_t gauge0,gauge1,gauge2,gauge3;
   uint64_t addr0,addr1,addr2,addr3;
-  const SiteSpinor *in_p; in_p = &in._odata[0];
+  const SiteSpinor *in_p; in_p = &in[0];
 
   int o0,o1,o2,o3; // offsets
   int l0,l1,l2,l3; // local 
@@ -830,7 +830,7 @@ template <> void StaggeredKernels<StaggeredImplF>::DhopSiteAsm(StencilImpl &st,
     PERMUTE23;
     MULT_ADD_XYZT(gauge2,gauge3);  
 
-    addr0 = (uint64_t) &out._odata[sF];
+    addr0 = (uint64_t) &out[sF];
     REDUCEa(addr0);
   }
 #else 
@@ -848,7 +848,7 @@ template <> void StaggeredKernels<StaggeredImplD>::DhopSiteAsm(StencilImpl &st,
 #ifdef AVX512
   uint64_t gauge0,gauge1,gauge2,gauge3;
   uint64_t addr0,addr1,addr2,addr3;
-  const SiteSpinor *in_p; in_p = &in._odata[0];
+  const SiteSpinor *in_p; in_p = &in[0];
 
   int o0,o1,o2,o3; // offsets
   int l0,l1,l2,l3; // local 
@@ -895,7 +895,7 @@ template <> void StaggeredKernels<StaggeredImplD>::DhopSiteAsm(StencilImpl &st,
     PERMUTE23;
     MULT_ADD_XYZT(gauge2,gauge3);  
     
-    addr0 = (uint64_t) &out._odata[sF];
+    addr0 = (uint64_t) &out[sF];
     REDUCEa(addr0);
   }
 #else 
diff --git a/lib/qcd/action/fermion/StaggeredKernelsHand.cc b/lib/qcd/action/fermion/StaggeredKernelsHand.cc
index bbbde7b4..c2c99534 100644
--- a/lib/qcd/action/fermion/StaggeredKernelsHand.cc
+++ b/lib/qcd/action/fermion/StaggeredKernelsHand.cc
@@ -39,7 +39,7 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
 
 // To splat or not to splat depends on the implementation
 #define MULT(A,UChi)				\
-  auto & ref(U._odata[sU](A));			\
+  auto & ref(U[sU](A));			\
   Impl::loadLinkElement(U_00,ref()(0,0));	\
   Impl::loadLinkElement(U_10,ref()(1,0));	\
   Impl::loadLinkElement(U_20,ref()(2,0));	\
@@ -60,7 +60,7 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
   UChi ## _2 += U_22*Chi_2;
 
 #define MULT_ADD(A,UChi)			\
-  auto & ref(U._odata[sU](A));			\
+  auto & ref(U[sU](A));			\
   Impl::loadLinkElement(U_00,ref()(0,0));	\
   Impl::loadLinkElement(U_10,ref()(1,0));	\
   Impl::loadLinkElement(U_20,ref()(2,0));	\
@@ -105,7 +105,7 @@ void StaggeredKernels<Impl>::DhopSiteHand(StencilImpl &st, LebesgueOrder &lo, Do
     int sF=s+LLs*sU;
     DhopSiteDepthHand(st,lo,U,buf,sF,sU,in,naive,oneLink);
     DhopSiteDepthHand(st,lo,UUU,buf,sF,sU,in,naik,threeLink);
-    out._odata[sF] =scale*(naive+naik);
+    out[sF] =scale*(naive+naik);
   }
 }
 
@@ -151,7 +151,7 @@ void StaggeredKernels<Impl>::DhopSiteDepthHand(StencilImpl &st, LebesgueOrder &l
   perm   = SE->_permute;
   
   if ( local ) {
-    LOAD_CHI(in._odata);
+    LOAD_CHI((&in[0]));
     if ( perm) {
       PERMUTE_DIR(3); // T==0, Z==1, Y==2, Z==3 expect 1,2,2,2 simd layout etc...
     }
@@ -169,7 +169,7 @@ void StaggeredKernels<Impl>::DhopSiteDepthHand(StencilImpl &st, LebesgueOrder &l
   perm   = SE->_permute;
   
   if ( local ) {
-    LOAD_CHI(in._odata);
+    LOAD_CHI((&in[0]));
     if ( perm) {
       PERMUTE_DIR(2); // T==0, Z==1, Y==2, Z==3 expect 1,2,2,2 simd layout etc...
     }
@@ -188,7 +188,7 @@ void StaggeredKernels<Impl>::DhopSiteDepthHand(StencilImpl &st, LebesgueOrder &l
   perm   = SE->_permute;
   
   if ( local ) {
-    LOAD_CHI(in._odata);
+    LOAD_CHI((&in[0]));
     if ( perm) {
       PERMUTE_DIR(1); // T==0, Z==1, Y==2, Z==3 expect 1,2,2,2 simd layout etc...
     }
@@ -206,7 +206,7 @@ void StaggeredKernels<Impl>::DhopSiteDepthHand(StencilImpl &st, LebesgueOrder &l
   perm   = SE->_permute;
   
   if ( local ) {
-    LOAD_CHI(in._odata);
+    LOAD_CHI((&in[0]));
     if ( perm) {
       PERMUTE_DIR(0); // T==0, Z==1, Y==2, Z==3 expect 1,2,2,2 simd layout etc...
     }
@@ -224,7 +224,7 @@ void StaggeredKernels<Impl>::DhopSiteDepthHand(StencilImpl &st, LebesgueOrder &l
   perm   = SE->_permute;
   
   if ( local ) {
-    LOAD_CHI(in._odata);
+    LOAD_CHI((&in[0]));
     if ( perm) {
       PERMUTE_DIR(3); // T==0, Z==1, Y==2, Z==3 expect 1,2,2,2 simd layout etc...
     }
@@ -243,7 +243,7 @@ void StaggeredKernels<Impl>::DhopSiteDepthHand(StencilImpl &st, LebesgueOrder &l
   perm   = SE->_permute;
   
   if ( local ) {
-    LOAD_CHI(in._odata);
+    LOAD_CHI((&in[0]));
     if ( perm) {
       PERMUTE_DIR(2); // T==0, Z==1, Y==2, Z==3 expect 1,2,2,2 simd layout etc...
     }
@@ -261,7 +261,7 @@ void StaggeredKernels<Impl>::DhopSiteDepthHand(StencilImpl &st, LebesgueOrder &l
   perm   = SE->_permute;
   
   if ( local ) {
-    LOAD_CHI(in._odata);
+    LOAD_CHI((&in[0]));
     if ( perm) {
       PERMUTE_DIR(1); // T==0, Z==1, Y==2, Z==3 expect 1,2,2,2 simd layout etc...
     }
@@ -279,7 +279,7 @@ void StaggeredKernels<Impl>::DhopSiteDepthHand(StencilImpl &st, LebesgueOrder &l
   perm   = SE->_permute;
   
   if ( local ) {
-    LOAD_CHI(in._odata);
+    LOAD_CHI((&in[0]));
     if ( perm) {
       PERMUTE_DIR(0); // T==0, Z==1, Y==2, Z==3 expect 1,2,2,2 simd layout etc...
     }
diff --git a/lib/qcd/action/fermion/WilsonFermion.cc b/lib/qcd/action/fermion/WilsonFermion.cc
index d6fdcd92..3a3770ea 100644
--- a/lib/qcd/action/fermion/WilsonFermion.cc
+++ b/lib/qcd/action/fermion/WilsonFermion.cc
@@ -79,21 +79,21 @@ void WilsonFermion<Impl>::ImportGauge(const GaugeField &_Umu) {
 
 template <class Impl>
 RealD WilsonFermion<Impl>::M(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   Dhop(in, out, DaggerNo);
   return axpy_norm(out, 4 + mass, in, out);
 }
 
 template <class Impl>
 RealD WilsonFermion<Impl>::Mdag(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   Dhop(in, out, DaggerYes);
   return axpy_norm(out, 4 + mass, in, out);
 }
 
 template <class Impl>
 void WilsonFermion<Impl>::Meooe(const FermionField &in, FermionField &out) {
-  if (in.checkerboard == Odd) {
+  if (in.Checkerboard() == Odd) {
     DhopEO(in, out, DaggerNo);
   } else {
     DhopOE(in, out, DaggerNo);
@@ -102,7 +102,7 @@ void WilsonFermion<Impl>::Meooe(const FermionField &in, FermionField &out) {
 
 template <class Impl>
 void WilsonFermion<Impl>::MeooeDag(const FermionField &in, FermionField &out) {
-  if (in.checkerboard == Odd) {
+  if (in.Checkerboard() == Odd) {
     DhopEO(in, out, DaggerYes);
   } else {
     DhopOE(in, out, DaggerYes);
@@ -111,26 +111,26 @@ void WilsonFermion<Impl>::MeooeDag(const FermionField &in, FermionField &out) {
   
 template <class Impl>
 void WilsonFermion<Impl>::Mooee(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   typename FermionField::scalar_type scal(4.0 + mass);
   out = scal * in;
 }
 
 template <class Impl>
 void WilsonFermion<Impl>::MooeeDag(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   Mooee(in, out);
 }
 
 template<class Impl>
 void WilsonFermion<Impl>::MooeeInv(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   out = (1.0/(4.0+mass))*in;
 }
   
 template<class Impl>
 void WilsonFermion<Impl>::MooeeInvDag(const FermionField &in, FermionField &out) {
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   MooeeInv(in,out);
 }
 template<class Impl>
@@ -233,7 +233,7 @@ void WilsonFermion<Impl>::DhopDeriv(GaugeField &mat, const FermionField &U, cons
   conformable(U._grid, V._grid);
   conformable(U._grid, mat._grid);
 
-  mat.checkerboard = U.checkerboard;
+  mat.Checkerboard() = U.Checkerboard();
 
   DerivInternal(Stencil, Umu, mat, U, V, dag);
 }
@@ -245,9 +245,9 @@ void WilsonFermion<Impl>::DhopDerivOE(GaugeField &mat, const FermionField &U, co
   //conformable(U._grid, mat._grid); not general, leaving as a comment (Guido)
   // Motivation: look at the SchurDiff operator
   
-  assert(V.checkerboard == Even);
-  assert(U.checkerboard == Odd);
-  mat.checkerboard = Odd;
+  assert(V.Checkerboard() == Even);
+  assert(U.Checkerboard() == Odd);
+  mat.Checkerboard() = Odd;
 
   DerivInternal(StencilEven, UmuOdd, mat, U, V, dag);
 }
@@ -258,9 +258,9 @@ void WilsonFermion<Impl>::DhopDerivEO(GaugeField &mat, const FermionField &U, co
   conformable(U._grid, V._grid);
   //conformable(U._grid, mat._grid);
 
-  assert(V.checkerboard == Odd);
-  assert(U.checkerboard == Even);
-  mat.checkerboard = Even;
+  assert(V.Checkerboard() == Odd);
+  assert(U.Checkerboard() == Even);
+  mat.Checkerboard() = Even;
 
   DerivInternal(StencilOdd, UmuEven, mat, U, V, dag);
 }
@@ -270,7 +270,7 @@ void WilsonFermion<Impl>::Dhop(const FermionField &in, FermionField &out, int da
   conformable(in._grid, _grid);  // verifies full grid
   conformable(in._grid, out._grid);
 
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
 
   DhopInternal(Stencil, Lebesgue, Umu, in, out, dag);
 }
@@ -280,8 +280,8 @@ void WilsonFermion<Impl>::DhopOE(const FermionField &in, FermionField &out, int
   conformable(in._grid, _cbgrid);    // verifies half grid
   conformable(in._grid, out._grid);  // drops the cb check
 
-  assert(in.checkerboard == Even);
-  out.checkerboard = Odd;
+  assert(in.Checkerboard() == Even);
+  out.Checkerboard() = Odd;
 
   DhopInternal(StencilEven, LebesgueEvenOdd, UmuOdd, in, out, dag);
 }
@@ -291,8 +291,8 @@ void WilsonFermion<Impl>::DhopEO(const FermionField &in, FermionField &out,int d
   conformable(in._grid, _cbgrid);    // verifies half grid
   conformable(in._grid, out._grid);  // drops the cb check
 
-  assert(in.checkerboard == Odd);
-  out.checkerboard = Even;
+  assert(in.Checkerboard() == Odd);
+  out.Checkerboard() = Even;
 
   DhopInternal(StencilOdd, LebesgueEvenOdd, UmuEven, in, out, dag);
 }
@@ -368,13 +368,13 @@ void WilsonFermion<Impl>::ContractConservedCurrent(PropagatorField &q_in_1,
   tmp2 = Cshift(q_in_2, mu, 1);
   parallel_for (unsigned int sU = 0; sU < Umu._grid->oSites(); ++sU)
     {
-      Kernels::ContractConservedCurrentSiteFwd(tmp1._odata[sU],
-					       q_in_2._odata[sU],
-					       q_out._odata[sU],
+      Kernels::ContractConservedCurrentSiteFwd(tmp1[sU],
+					       q_in_2[sU],
+					       q_out[sU],
 					       Umu, sU, mu);
-      Kernels::ContractConservedCurrentSiteBwd(q_in_1._odata[sU],
-					       tmp2._odata[sU],
-					       q_out._odata[sU],
+      Kernels::ContractConservedCurrentSiteBwd(q_in_1[sU],
+					       tmp2[sU],
+					       q_out[sU],
 					       Umu, sU, mu);
     }
 }
@@ -419,31 +419,31 @@ void WilsonFermion<Impl>::SeqConservedCurrent(PropagatorField &q_in,
     {
       // Compute the sequential conserved current insertion only if our simd
       // object contains a timeslice we need.
-      vInteger t_mask   = ((coords._odata[sU] >= tmin) &&
-			   (coords._odata[sU] <= tmax));
+      vInteger t_mask   = ((coords[sU] >= tmin) &&
+			   (coords[sU] <= tmax));
       Integer timeSlices = Reduce(t_mask);
 
       if (timeSlices > 0)
         {
-	  Kernels::SeqConservedCurrentSiteFwd(tmpFwd._odata[sU], 
-					      q_out._odata[sU], 
+	  Kernels::SeqConservedCurrentSiteFwd(tmpFwd[sU], 
+					      q_out[sU], 
 					      Umu, sU, mu, t_mask);
         }
 
       // Repeat for backward direction.
-      t_mask     = ((coords._odata[sU] >= (tmin + tshift)) && 
-		    (coords._odata[sU] <= (tmax + tshift)));
+      t_mask     = ((coords[sU] >= (tmin + tshift)) && 
+		    (coords[sU] <= (tmax + tshift)));
 
       //if tmax = LLt-1 (last timeslice) include timeslice 0 if the time is shifted (mu=3)	
       unsigned int t0 = 0;
-      if((tmax==LLt-1) && (tshift==1)) t_mask = (t_mask || (coords._odata[sU] == t0 ));
+      if((tmax==LLt-1) && (tshift==1)) t_mask = (t_mask || (coords[sU] == t0 ));
 
       timeSlices = Reduce(t_mask);
 
       if (timeSlices > 0)
         {
-	  Kernels::SeqConservedCurrentSiteBwd(tmpBwd._odata[sU], 
-					      q_out._odata[sU], 
+	  Kernels::SeqConservedCurrentSiteBwd(tmpBwd[sU], 
+					      q_out[sU], 
 					      Umu, sU, mu, t_mask);
         }
     }
diff --git a/lib/qcd/action/fermion/WilsonFermion5D.cc b/lib/qcd/action/fermion/WilsonFermion5D.cc
index 1d4bc038..7af63594 100644
--- a/lib/qcd/action/fermion/WilsonFermion5D.cc
+++ b/lib/qcd/action/fermion/WilsonFermion5D.cc
@@ -328,7 +328,7 @@ void WilsonFermion5D<Impl>::DhopDeriv(GaugeField &mat,
 
   //conformable(GaugeGrid(),mat._grid);// this is not general! leaving as a comment
 
-  mat.checkerboard = A.checkerboard;
+  mat.Checkerboard() = A.Checkerboard();
 
   DerivInternal(Stencil,Umu,mat,A,B,dag);
 }
@@ -342,9 +342,9 @@ void WilsonFermion5D<Impl>::DhopDerivEO(GaugeField &mat,
   conformable(A._grid,FermionRedBlackGrid());
   conformable(A._grid,B._grid);
 
-  assert(B.checkerboard==Odd);
-  assert(A.checkerboard==Even);
-  mat.checkerboard = Even;
+  assert(B.Checkerboard()==Odd);
+  assert(A.Checkerboard()==Even);
+  mat.Checkerboard() = Even;
 
   DerivInternal(StencilOdd,UmuEven,mat,A,B,dag);
 }
@@ -359,9 +359,9 @@ void WilsonFermion5D<Impl>::DhopDerivOE(GaugeField &mat,
   conformable(A._grid,FermionRedBlackGrid());
   conformable(A._grid,B._grid);
 
-  assert(B.checkerboard==Even);
-  assert(A.checkerboard==Odd);
-  mat.checkerboard = Odd;
+  assert(B.Checkerboard()==Even);
+  assert(A.Checkerboard()==Odd);
+  mat.Checkerboard() = Odd;
 
   DerivInternal(StencilEven,UmuOdd,mat,A,B,dag);
 }
@@ -525,8 +525,8 @@ void WilsonFermion5D<Impl>::DhopOE(const FermionField &in, FermionField &out,int
   conformable(in._grid,FermionRedBlackGrid());    // verifies half grid
   conformable(in._grid,out._grid); // drops the cb check
 
-  assert(in.checkerboard==Even);
-  out.checkerboard = Odd;
+  assert(in.Checkerboard()==Even);
+  out.Checkerboard() = Odd;
 
   DhopInternal(StencilEven,LebesgueEvenOdd,UmuOdd,in,out,dag);
 }
@@ -537,8 +537,8 @@ void WilsonFermion5D<Impl>::DhopEO(const FermionField &in, FermionField &out,int
   conformable(in._grid,FermionRedBlackGrid());    // verifies half grid
   conformable(in._grid,out._grid); // drops the cb check
 
-  assert(in.checkerboard==Odd);
-  out.checkerboard = Even;
+  assert(in.Checkerboard()==Odd);
+  out.Checkerboard() = Even;
 
   DhopInternal(StencilOdd,LebesgueEvenOdd,UmuEven,in,out,dag);
 }
@@ -549,14 +549,14 @@ void WilsonFermion5D<Impl>::Dhop(const FermionField &in, FermionField &out,int d
   conformable(in._grid,FermionGrid()); // verifies full grid
   conformable(in._grid,out._grid);
 
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
 
   DhopInternal(Stencil,Lebesgue,Umu,in,out,dag);
 }
 template<class Impl>
 void WilsonFermion5D<Impl>::DW(const FermionField &in, FermionField &out,int dag)
 {
-  out.checkerboard=in.checkerboard;
+  out.Checkerboard()=in.Checkerboard();
   Dhop(in,out,dag); // -0.5 is included
   axpy(out,4.0-M5,in,out);
 }
@@ -754,21 +754,21 @@ void WilsonFermion5D<Impl>::ContractConservedCurrent(PropagatorField &q_in_1,
 	  // sites correctly.
 	  if (Impl::LsVectorised)
             {
-	      REVERSE_LS(q_in_2._odata[sF2], qSite2, Ls / LLs);
-	      REVERSE_LS(tmp2._odata[sF2], qmuSite2, Ls / LLs);
+	      REVERSE_LS(q_in_2[sF2], qSite2, Ls / LLs);
+	      REVERSE_LS(tmp2[sF2], qmuSite2, Ls / LLs);
             }
 	  else
             {
-	      qSite2   = q_in_2._odata[sF2];
-	      qmuSite2 = tmp2._odata[sF2];
+	      qSite2   = q_in_2[sF2];
+	      qmuSite2 = tmp2[sF2];
             }
-	  Kernels::ContractConservedCurrentSiteFwd(tmp1._odata[sF1], 
+	  Kernels::ContractConservedCurrentSiteFwd(tmp1[sF1], 
 						   qSite2, 
-						   q_out._odata[sU],
+						   q_out[sU],
 						   Umu, sU, mu, axial_sign);
-	  Kernels::ContractConservedCurrentSiteBwd(q_in_1._odata[sF1],
+	  Kernels::ContractConservedCurrentSiteBwd(q_in_1[sF1],
 						   qmuSite2,
-						   q_out._odata[sU],
+						   q_out[sU],
 						   Umu, sU, mu, axial_sign);
 	  sF1++;
 	  sF2--;
@@ -821,8 +821,8 @@ void WilsonFermion5D<Impl>::SeqConservedCurrent(PropagatorField &q_in,
     {
       // Compute the sequential conserved current insertion only if our simd
       // object contains a timeslice we need.
-      vInteger t_mask   = ((coords._odata[sU] >= tmin) &&
-			   (coords._odata[sU] <= tmax));
+      vInteger t_mask   = ((coords[sU] >= tmin) &&
+			   (coords[sU] <= tmax));
       Integer timeSlices = Reduce(t_mask);
 
       if (timeSlices > 0)
@@ -831,20 +831,20 @@ void WilsonFermion5D<Impl>::SeqConservedCurrent(PropagatorField &q_in,
 	  for (unsigned int s = 0; s < LLs; ++s)
             {
 	      bool axial_sign = ((curr_type == Current::Axial) && (s < (LLs / 2)));
-	      Kernels::SeqConservedCurrentSiteFwd(tmpFwd._odata[sF], 
-						  q_out._odata[sF], Umu, sU,
+	      Kernels::SeqConservedCurrentSiteFwd(tmpFwd[sF], 
+						  q_out[sF], Umu, sU,
 						  mu, t_mask, axial_sign);
 	      ++sF;
             }
         }
 
       // Repeat for backward direction.
-      t_mask     = ((coords._odata[sU] >= (tmin + tshift)) && 
-		    (coords._odata[sU] <= (tmax + tshift)));
+      t_mask     = ((coords[sU] >= (tmin + tshift)) && 
+		    (coords[sU] <= (tmax + tshift)));
 
       //if tmax = LLt-1 (last timeslice) include timeslice 0 if the time is shifted (mu=3)	
       unsigned int t0 = 0;
-      if((tmax==LLt-1) && (tshift==1)) t_mask = (t_mask || (coords._odata[sU] == t0 ));
+      if((tmax==LLt-1) && (tshift==1)) t_mask = (t_mask || (coords[sU] == t0 ));
 
       timeSlices = Reduce(t_mask);
 
@@ -854,8 +854,8 @@ void WilsonFermion5D<Impl>::SeqConservedCurrent(PropagatorField &q_in,
 	  for (unsigned int s = 0; s < LLs; ++s)
             {
 	      bool axial_sign = ((curr_type == Current::Axial) && (s < (LLs / 2)));
-	      Kernels::SeqConservedCurrentSiteBwd(tmpBwd._odata[sF], 
-						  q_out._odata[sF], Umu, sU,
+	      Kernels::SeqConservedCurrentSiteBwd(tmpBwd[sF], 
+						  q_out[sF], Umu, sU,
 						  mu, t_mask, axial_sign);
 	      ++sF;
             }
diff --git a/lib/qcd/action/fermion/WilsonKernels.cc b/lib/qcd/action/fermion/WilsonKernels.cc
index ce3e3f5b..05d249f0 100644
--- a/lib/qcd/action/fermion/WilsonKernels.cc
+++ b/lib/qcd/action/fermion/WilsonKernels.cc
@@ -47,15 +47,15 @@ WilsonKernels<Impl>::WilsonKernels(const ImplParams &p) : Base(p){};
   if (SE->_is_local) {						\
     chi_p = &chi;						\
     if (SE->_permute) {						\
-      spProj(tmp, in._odata[SE->_offset]);			\
+      spProj(tmp, in[SE->_offset]);			\
       permute(chi, tmp, ptype);					\
     } else {							\
-      spProj(chi, in._odata[SE->_offset]);			\
+      spProj(chi, in[SE->_offset]);			\
     }								\
   } else {							\
     chi_p = &buf[SE->_offset];					\
   }								\
-  Impl::multLink(Uchi, U._odata[sU], *chi_p, Dir, SE, st);	\
+  Impl::multLink(Uchi, U[sU], *chi_p, Dir, SE, st);	\
   Recon(result, Uchi);
   
 #define GENERIC_STENCIL_LEG_INT(Dir,spProj,Recon)		\
@@ -63,16 +63,16 @@ WilsonKernels<Impl>::WilsonKernels(const ImplParams &p) : Base(p){};
   if (SE->_is_local) {						\
     chi_p = &chi;						\
     if (SE->_permute) {						\
-      spProj(tmp, in._odata[SE->_offset]);			\
+      spProj(tmp, in[SE->_offset]);			\
       permute(chi, tmp, ptype);					\
     } else {							\
-      spProj(chi, in._odata[SE->_offset]);			\
+      spProj(chi, in[SE->_offset]);			\
     }								\
   } else if ( st.same_node[Dir] ) {				\
       chi_p = &buf[SE->_offset];				\
   }								\
   if (SE->_is_local || st.same_node[Dir] ) {			\
-    Impl::multLink(Uchi, U._odata[sU], *chi_p, Dir, SE, st);	\
+    Impl::multLink(Uchi, U[sU], *chi_p, Dir, SE, st);	\
     Recon(result, Uchi);					\
   }
 
@@ -80,7 +80,7 @@ WilsonKernels<Impl>::WilsonKernels(const ImplParams &p) : Base(p){};
   SE = st.GetEntry(ptype, Dir, sF);				\
   if ((!SE->_is_local) && (!st.same_node[Dir]) ) {		\
     chi_p = &buf[SE->_offset];					\
-    Impl::multLink(Uchi, U._odata[sU], *chi_p, Dir, SE, st);	\
+    Impl::multLink(Uchi, U[sU], *chi_p, Dir, SE, st);	\
     Recon(result, Uchi);					\
     nmu++;							\
   }
@@ -88,14 +88,14 @@ WilsonKernels<Impl>::WilsonKernels(const ImplParams &p) : Base(p){};
 #define GENERIC_DHOPDIR_LEG(Dir,spProj,Recon)			\
   if (gamma == Dir) {						\
     if (SE->_is_local && SE->_permute) {			\
-      spProj(tmp, in._odata[SE->_offset]);			\
+      spProj(tmp, in[SE->_offset]);			\
       permute(chi, tmp, ptype);					\
     } else if (SE->_is_local) {					\
-      spProj(chi, in._odata[SE->_offset]);			\
+      spProj(chi, in[SE->_offset]);			\
     } else {							\
       chi = buf[SE->_offset];					\
     }								\
-    Impl::multLink(Uchi, U._odata[sU], chi, dir, SE, st);	\
+    Impl::multLink(Uchi, U[sU], chi, dir, SE, st);	\
     Recon(result, Uchi);					\
   }
 
@@ -123,7 +123,7 @@ void WilsonKernels<Impl>::GenericDhopSiteDag(StencilImpl &st, LebesgueOrder &lo,
   GENERIC_STENCIL_LEG(Ym,spProjYm,accumReconYm);
   GENERIC_STENCIL_LEG(Zm,spProjZm,accumReconZm);
   GENERIC_STENCIL_LEG(Tm,spProjTm,accumReconTm);
-  vstream(out._odata[sF], result);
+  vstream(out[sF], result);
 };
 
 template <class Impl>
@@ -147,7 +147,7 @@ void WilsonKernels<Impl>::GenericDhopSite(StencilImpl &st, LebesgueOrder &lo, Do
   GENERIC_STENCIL_LEG(Yp,spProjYm,accumReconYm);
   GENERIC_STENCIL_LEG(Zp,spProjZm,accumReconZm);
   GENERIC_STENCIL_LEG(Tp,spProjTm,accumReconTm);
-  vstream(out._odata[sF], result);
+  vstream(out[sF], result);
 };
   ////////////////////////////////////////////////////////////////////
   // Interior kernels
@@ -174,7 +174,7 @@ void WilsonKernels<Impl>::GenericDhopSiteDagInt(StencilImpl &st, LebesgueOrder &
   GENERIC_STENCIL_LEG_INT(Ym,spProjYm,accumReconYm);
   GENERIC_STENCIL_LEG_INT(Zm,spProjZm,accumReconZm);
   GENERIC_STENCIL_LEG_INT(Tm,spProjTm,accumReconTm);
-  vstream(out._odata[sF], result);
+  vstream(out[sF], result);
 };
 
 template <class Impl>
@@ -198,7 +198,7 @@ void WilsonKernels<Impl>::GenericDhopSiteInt(StencilImpl &st, LebesgueOrder &lo,
   GENERIC_STENCIL_LEG_INT(Yp,spProjYm,accumReconYm);
   GENERIC_STENCIL_LEG_INT(Zp,spProjZm,accumReconZm);
   GENERIC_STENCIL_LEG_INT(Tp,spProjTm,accumReconTm);
-  vstream(out._odata[sF], result);
+  vstream(out[sF], result);
 };
 ////////////////////////////////////////////////////////////////////
 // Exterior kernels
@@ -226,7 +226,7 @@ void WilsonKernels<Impl>::GenericDhopSiteDagExt(StencilImpl &st, LebesgueOrder &
   GENERIC_STENCIL_LEG_EXT(Zm,spProjZm,accumReconZm);
   GENERIC_STENCIL_LEG_EXT(Tm,spProjTm,accumReconTm);
   if ( nmu ) { 
-    out._odata[sF] = out._odata[sF] + result; 
+    out[sF] = out[sF] + result; 
   }
 };
 
@@ -253,7 +253,7 @@ void WilsonKernels<Impl>::GenericDhopSiteExt(StencilImpl &st, LebesgueOrder &lo,
   GENERIC_STENCIL_LEG_EXT(Zp,spProjZm,accumReconZm);
   GENERIC_STENCIL_LEG_EXT(Tp,spProjTm,accumReconTm);
   if ( nmu ) { 
-    out._odata[sF] = out._odata[sF] + result; 
+    out[sF] = out[sF] + result; 
   }
 };
 
@@ -277,7 +277,7 @@ void WilsonKernels<Impl>::DhopDirK( StencilImpl &st, DoubledGaugeField &U,SiteHa
   GENERIC_DHOPDIR_LEG(Ym,spProjYm,spReconYm);
   GENERIC_DHOPDIR_LEG(Zm,spProjZm,spReconZm);
   GENERIC_DHOPDIR_LEG(Tm,spProjTm,spReconTm);
-  vstream(out._odata[sF], result);
+  vstream(out[sF], result);
 }
 
 /*******************************************************************************
@@ -307,7 +307,7 @@ void WilsonKernels<Impl>::ContractConservedCurrentSiteFwd(
 {
     SitePropagator result, tmp;
     Gamma g5(Gamma::Algebra::Gamma5);
-    Impl::multLinkProp(tmp, U._odata[sU], q_in_1, mu);
+    Impl::multLinkProp(tmp, U[sU], q_in_1, mu);
     result = g5 * adj(q_in_2) * g5 * WilsonCurrentFwd(tmp, mu);
     if (switch_sign)
     {
@@ -337,7 +337,7 @@ void WilsonKernels<Impl>::ContractConservedCurrentSiteBwd(
 {
     SitePropagator result, tmp;
     Gamma g5(Gamma::Algebra::Gamma5);
-    Impl::multLinkProp(tmp, U._odata[sU], q_in_1, mu + Nd);
+    Impl::multLinkProp(tmp, U[sU], q_in_1, mu + Nd);
     result = g5 * adj(q_in_2) * g5 * WilsonCurrentBwd(tmp, mu);
     if (switch_sign)
     {
@@ -398,7 +398,7 @@ void WilsonKernels<Impl>::SeqConservedCurrentSiteFwd(const SitePropagator &q_in,
                                                      bool switch_sign)
 {
     SitePropagator result;
-    Impl::multLinkProp(result, U._odata[sU], q_in, mu);
+    Impl::multLinkProp(result, U[sU], q_in, mu);
     result = WilsonCurrentFwd(result, mu);
 
     // Zero any unwanted timeslice entries.
@@ -430,7 +430,7 @@ void WilsonKernels<Impl>::SeqConservedCurrentSiteBwd(const SitePropagator &q_in,
                                                      bool switch_sign)
 {
     SitePropagator result;
-    Impl::multLinkProp(result, U._odata[sU], q_in, mu + Nd);
+    Impl::multLinkProp(result, U[sU], q_in, mu + Nd);
     result = WilsonCurrentBwd(result, mu);
 
     // Zero any unwanted timeslice entries.
diff --git a/lib/qcd/action/fermion/WilsonKernelsAsmBody.h b/lib/qcd/action/fermion/WilsonKernelsAsmBody.h
index db8651ab..8520dc84 100644
--- a/lib/qcd/action/fermion/WilsonKernelsAsmBody.h
+++ b/lib/qcd/action/fermion/WilsonKernelsAsmBody.h
@@ -130,7 +130,7 @@
   int local,perm, ptype;
   uint64_t base;
   uint64_t basep;
-  const uint64_t plocal =(uint64_t) & in._odata[0];
+  const uint64_t plocal =(uint64_t) & in[0];
 
   COMPLEX_SIGNS(isigns);
   MASK_REGS;
@@ -166,7 +166,7 @@
       if (nmu==0) break;
       //      if (nmu!=0) std::cout << "EXT "<<sU<<std::endl;
 #endif
-      base = (uint64_t) &out._odata[ss];
+      base = (uint64_t) &out[ss];
       basep= st.GetPFInfo(nent,plocal); nent++;
       RESULT(base,basep);
     }
diff --git a/lib/qcd/action/fermion/WilsonKernelsHand.cc b/lib/qcd/action/fermion/WilsonKernelsHand.cc
index 8b21103a..30609e61 100644
--- a/lib/qcd/action/fermion/WilsonKernelsHand.cc
+++ b/lib/qcd/action/fermion/WilsonKernelsHand.cc
@@ -45,7 +45,7 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
   Chimu_32=ref(F)(3)(2)
 
 #define LOAD_CHIMU(DIR,F,PERM)						\
-  { const SiteSpinor & ref (in._odata[offset]); LOAD_CHIMU_BODY(F); }
+  { const SiteSpinor & ref (in[offset]); LOAD_CHIMU_BODY(F); }
 
 #define LOAD_CHI_BODY(F)				\
     Chi_00 = ref(F)(0)(0);\
@@ -103,7 +103,7 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
   }  
 
 #define LOAD_CHIMU_GPARITY_INPLACE_TWIST(DIR,F,PERM)			\
-  { const SiteSpinor &ref(in._odata[offset]);				\
+  { const SiteSpinor &ref(in[offset]);				\
     LOAD_CHI_SETUP(DIR,F);						\
     if(!inplace_twist){							\
       LOAD_CHIMU_BODY(g);						\
@@ -201,10 +201,10 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
 
 
 #define MULT_2SPIN(A,F)					\
-  {auto & ref(U._odata[sU](A)); MULT_2SPIN_BODY; }
+  {auto & ref(U[sU](A)); MULT_2SPIN_BODY; }
 
 #define MULT_2SPIN_GPARITY(A,F)				\
-  {auto & ref(U._odata[sU](F)(A)); MULT_2SPIN_BODY; }
+  {auto & ref(U[sU](F)(A)); MULT_2SPIN_BODY; }
 
 
 #define PERMUTE_DIR(dir)			\
@@ -478,7 +478,7 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
 
 #define HAND_RESULT(ss,F)			\
   {						\
-    SiteSpinor & ref (out._odata[ss]);		\
+    SiteSpinor & ref (out[ss]);		\
     vstream(ref(F)(0)(0),result_00);		\
     vstream(ref(F)(0)(1),result_01);		\
     vstream(ref(F)(0)(2),result_02);		\
@@ -495,7 +495,7 @@ Author: paboyle <paboyle@ph.ed.ac.uk>
 
 #define HAND_RESULT_EXT(ss,F)			\
   if (nmu){					\
-    SiteSpinor & ref (out._odata[ss]);		\
+    SiteSpinor & ref (out[ss]);		\
     ref(F)(0)(0)+=result_00;		\
     ref(F)(0)(1)+=result_01;		\
     ref(F)(0)(2)+=result_02;		\
diff --git a/lib/qcd/action/fermion/WilsonTMFermion.cc b/lib/qcd/action/fermion/WilsonTMFermion.cc
index 049a959d..481f445f 100644
--- a/lib/qcd/action/fermion/WilsonTMFermion.cc
+++ b/lib/qcd/action/fermion/WilsonTMFermion.cc
@@ -61,14 +61,14 @@ template<class Impl>
 void WilsonTMFermion<Impl>::Mooee(const FermionField &in, FermionField &out) {
   RealD a = 4.0+this->mass;
   RealD b = this->mu;
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   axpibg5x(out,in,a,b);
 }
 template<class Impl>
 void WilsonTMFermion<Impl>::MooeeDag(const FermionField &in, FermionField &out) {
   RealD a = 4.0+this->mass;
   RealD b = -this->mu;
-  out.checkerboard = in.checkerboard;
+  out.Checkerboard() = in.Checkerboard();
   axpibg5x(out,in,a,b);
 }
 template<class Impl>