diff --git a/parallel.py b/parallel.py
index 3d5ddb8..f33a336 100644
--- a/parallel.py
+++ b/parallel.py
@@ -280,11 +280,11 @@ class PPP:
         else:
             raise ValueError("Invalid shifting state.")
         self.field[key_out] = self.field[key].derivative(axis,padding=padding)
-        self.origin[key_out] = tuple(origin)
-        self.spacing[key_out] = self.spacing[key].copy()
-        self.symmetries[key_out] = self.symmetries[key].copy()
-        # TBD: copy everything field specific
-        # TBD: make sure processor distribution is fine
+        self.origin[key_out]        = tuple(origin)
+        self.spacing[key_out]       = self.spacing[key].copy()
+        self.symmetries[key_out]    = self.symmetries[key].copy()
+        self.proc_grid[key_out]     = self.proc_grid[key].copy()
+        self.proc_grid_ext[key_out] = self.proc_grid_ext[key].copy()
         if axis==0: 
             self.symmetries[key_out][0,1,1] = -self.symmetries[key_out][0,1,1]
             self.symmetries[key_out][2,1,1] = -self.symmetries[key_out][2,1,1]