diff --git a/AsterX/interface.ccl b/AsterX/interface.ccl
index e1e91ae5..81e0c0aa 100644
--- a/AsterX/interface.ccl
+++ b/AsterX/interface.ccl
@@ -199,32 +199,47 @@ CCTK_REAL a_zface TYPE=gf CENTERING={ccv} TAGS='checkpoint="no"'
 
 # For Subcycling
 
-CCTK_REAL cons_vectorold TYPE=gf CENTERING={ccc} TAGS='checkpoint="no"' { densold, momxold, momyold, momzold, tauold, DYe_old, DEntold } "Conserved vector RHS"
-CCTK_REAL Avec_x_old TYPE=gf CENTERING={cvv} TAGS='checkpoint="no"' "x-component of vector potential RHS"
-CCTK_REAL Avec_y_old TYPE=gf CENTERING={vcv} TAGS='checkpoint="no"' "y-component of vector potential RHS"
-CCTK_REAL Avec_z_old TYPE=gf CENTERING={vvc} TAGS='checkpoint="no"' "z-component of vector potential RHS"
-CCTK_REAL Psi_old TYPE=gf CENTERING={vvv} TAGS='checkpoint="no"' "t-component of vector potential RHS"
-
-CCTK_REAL cons_vectork1 TYPE=gf CENTERING={ccc} TAGS='checkpoint="no"' { densk1, momxk1, momyk1, momzk1, tauk1, DYe_k1, DEntk1 } "Conserved vector RHS"
-CCTK_REAL Avec_x_k1 TYPE=gf CENTERING={cvv} TAGS='checkpoint="no"' "x-component of vector potential RHS"
-CCTK_REAL Avec_y_k1 TYPE=gf CENTERING={vcv} TAGS='checkpoint="no"' "y-component of vector potential RHS"
-CCTK_REAL Avec_z_k1 TYPE=gf CENTERING={vvc} TAGS='checkpoint="no"' "z-component of vector potential RHS"
-CCTK_REAL Psi_k1 TYPE=gf CENTERING={vvv} TAGS='checkpoint="no"' "t-component of vector potential RHS"
-
-CCTK_REAL cons_vectork2 TYPE=gf CENTERING={ccc} TAGS='checkpoint="no"' { densk2, momxk2, momyk2, momzk2, tauk2, DYe_k2, DEntk2 } "Conserved vector RHS"
-CCTK_REAL Avec_x_k2 TYPE=gf CENTERING={cvv} TAGS='checkpoint="no"' "x-component of vector potential RHS"
-CCTK_REAL Avec_y_k2 TYPE=gf CENTERING={vcv} TAGS='checkpoint="no"' "y-component of vector potential RHS"
-CCTK_REAL Avec_z_k2 TYPE=gf CENTERING={vvc} TAGS='checkpoint="no"' "z-component of vector potential RHS"
-CCTK_REAL Psi_k2 TYPE=gf CENTERING={vvv} TAGS='checkpoint="no"' "t-component of vector potential RHS"
-
-CCTK_REAL cons_vectork3 TYPE=gf CENTERING={ccc} TAGS='checkpoint="no"' { densk3, momxk3, momyk3, momzk3, tauk3, DYe_k3, DEntk3 } "Conserved vector RHS"
-CCTK_REAL Avec_x_k3 TYPE=gf CENTERING={cvv} TAGS='checkpoint="no"' "x-component of vector potential RHS"
-CCTK_REAL Avec_y_k3 TYPE=gf CENTERING={vcv} TAGS='checkpoint="no"' "y-component of vector potential RHS"
-CCTK_REAL Avec_z_k3 TYPE=gf CENTERING={vvc} TAGS='checkpoint="no"' "z-component of vector potential RHS"
-CCTK_REAL Psi_k3 TYPE=gf CENTERING={vvv} TAGS='checkpoint="no"' "t-component of vector potential RHS"
-
-CCTK_REAL cons_vectork4 TYPE=gf CENTERING={ccc} TAGS='checkpoint="no"' { densk4, momxk4, momyk4, momzk4, tauk4, DYe_k4, DEntk4 } "Conserved vector RHS"
-CCTK_REAL Avec_x_k4 TYPE=gf CENTERING={cvv} TAGS='checkpoint="no"' "x-component of vector potential RHS"
-CCTK_REAL Avec_y_k4 TYPE=gf CENTERING={vcv} TAGS='checkpoint="no"' "y-component of vector potential RHS"
-CCTK_REAL Avec_z_k4 TYPE=gf CENTERING={vvc} TAGS='checkpoint="no"' "z-component of vector potential RHS"
-CCTK_REAL Psi_k4 TYPE=gf CENTERING={vvv} TAGS='checkpoint="no"' "t-component of vector potential RHS"
+CCTK_REAL cons_vectorold TYPE=gf CENTERING={ccc} TAGS='checkpoint="no" prolongation_type="minmod" prolongation_order=1'
+{
+  densold, momxold, momyold, momzold, tauold, DYeold, DEntold
+} "Conserved vector RHS"
+CCTK_REAL Avec_x_old TYPE=gf CENTERING={cvv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "x-component of vector potential RHS"
+CCTK_REAL Avec_y_old TYPE=gf CENTERING={vcv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "y-component of vector potential RHS"
+CCTK_REAL Avec_z_old TYPE=gf CENTERING={vvc} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "z-component of vector potential RHS"
+CCTK_REAL Psi_old TYPE=gf CENTERING={vvv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "t-component of vector potential RHS"
+
+CCTK_REAL cons_vectork1 TYPE=gf CENTERING={ccc} TAGS='checkpoint="no" prolongation_type="minmod" prolongation_order=1'
+{
+  densk1, momxk1, momyk1, momzk1, tauk1, DYek1, DEntk1
+} "Conserved vector RHS"
+CCTK_REAL Avec_x_k1 TYPE=gf CENTERING={cvv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "x-component of vector potential RHS"
+CCTK_REAL Avec_y_k1 TYPE=gf CENTERING={vcv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "y-component of vector potential RHS"
+CCTK_REAL Avec_z_k1 TYPE=gf CENTERING={vvc} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "z-component of vector potential RHS"
+CCTK_REAL Psi_k1 TYPE=gf CENTERING={vvv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "t-component of vector potential RHS"
+
+CCTK_REAL cons_vectork2 TYPE=gf CENTERING={ccc} TAGS='checkpoint="no" prolongation_type="minmod" prolongation_order=1'
+{
+  densk2, momxk2, momyk2, momzk2, tauk2, DYek2, DEntk2
+} "Conserved vector RHS"
+CCTK_REAL Avec_x_k2 TYPE=gf CENTERING={cvv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "x-component of vector potential RHS"
+CCTK_REAL Avec_y_k2 TYPE=gf CENTERING={vcv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "y-component of vector potential RHS"
+CCTK_REAL Avec_z_k2 TYPE=gf CENTERING={vvc} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "z-component of vector potential RHS"
+CCTK_REAL Psi_k2 TYPE=gf CENTERING={vvv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "t-component of vector potential RHS"
+
+CCTK_REAL cons_vectork3 TYPE=gf CENTERING={ccc} TAGS='checkpoint="no" prolongation_type="minmod" prolongation_order=1'
+{
+  densk3, momxk3, momyk3, momzk3, tauk3, DYek3, DEntk3
+} "Conserved vector RHS"
+CCTK_REAL Avec_x_k3 TYPE=gf CENTERING={cvv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "x-component of vector potential RHS"
+CCTK_REAL Avec_y_k3 TYPE=gf CENTERING={vcv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "y-component of vector potential RHS"
+CCTK_REAL Avec_z_k3 TYPE=gf CENTERING={vvc} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "z-component of vector potential RHS"
+CCTK_REAL Psi_k3 TYPE=gf CENTERING={vvv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "t-component of vector potential RHS"
+
+CCTK_REAL cons_vectork4 TYPE=gf CENTERING={ccc} TAGS='checkpoint="no" prolongation_type="minmod" prolongation_order=1'
+{
+  densk4, momxk4, momyk4, momzk4, tauk4, DYek4, DEntk4
+} "Conserved vector RHS"
+CCTK_REAL Avec_x_k4 TYPE=gf CENTERING={cvv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "x-component of vector potential RHS"
+CCTK_REAL Avec_y_k4 TYPE=gf CENTERING={vcv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "y-component of vector potential RHS"
+CCTK_REAL Avec_z_k4 TYPE=gf CENTERING={vvc} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "z-component of vector potential RHS"
+CCTK_REAL Psi_k4 TYPE=gf CENTERING={vvv} TAGS='checkpoint="no" prolongation_type="hermite" prolongation_order=5' "t-component of vector potential RHS"