 
 // Test instantiation
 template <>
-void degridGPU<512, 8, true>(
+void degridGPU<512, 8>(
     double wstep
   , const BlWMap permutations[/* baselines */]
   , complexd* out_vis

  }
};

// All pointers are *device* pointers,
//   all buffer are already allocated on device,
//   necessary data are marshalled.
template <
    int max_gcf_dim
  , int over
  , bool use_permutations
  >
void degridGPU(
    double wstep

  , int img_dim
  ) {
  for(int bl = 0; bl < baselines; bl++) {
    // Always use (sorted) permutations vector
    bl = permutations[bl].bl;
    int gcf_dim = get_supp(permutations[bl].wp);
    // No mirrored GCF yet
    if (gcf_dim <= 16) {
