diff --git a/VERSION b/VERSION
index 7eeb2c7..32c4ece 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.62
+1.0.63
diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index 3cd4f54..0c83c7f 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -1511,6 +1511,9 @@
  grow-min 840
  bridge	700 600
 
+ # Simple spacing checks to lvnwell must use CIF-DRC rule
+ templayer allmvdiffnowell *mvndiff,*mvpsd
+
  templayer lvnwell nwell
  and-not mvnwell
 
@@ -5129,8 +5132,11 @@
 	"N-well overlap of MV varactor < %d (lvtn.10 + lvtn.4b)"
  spacing *mvndiode *mvndiode 1070 touching_ok \
 	"MV N-diode spacing < %d (hvntm.2 + 2 * hvntm.3)"
- spacing alldiffmv nwell 825 surround_ok \
-	"MV N-diffusion to nwell spacing < %d (hvi.5 + nsd/psd.5)"
+
+variants (full)
+ cifspacing allmvdiffnowell lvnwell 825 touching_illegal \
+	"MV diffusion to LV nwell spacing < %d (hvi.5 + nsd/psd.5)"
+variants (fast),(full)
 
  spacing allnfets allpactivenonfet 270 touching_illegal \
 	"nFET cannot abut P-diffusion (diff/tap.3)"