diff --git a/bolex_90_degree_prism.scad b/bolex_90_degree_prism.scad
index d8dde32..3d462d2 100644
--- a/bolex_90_degree_prism.scad
+++ b/bolex_90_degree_prism.scad
@@ -11,10 +11,10 @@ EndD = 6.2;
 PrismXOffset = -0.426;
 PrismYOffset = 5.5; //for 12mm
 
-PrismX = PrismXOffset + ((PrismSize - 12) / 2) + 1;
-PrismY = (Y / 2) - (PrismSize / 2) - (PrismYOffset - ((PrismSize - 12) / 2));
+PrismX = PrismXOffset + ((PrismSize - 12) / 2) + 0.75;
+PrismY = (Y / 2) - (PrismSize / 2) - (PrismYOffset - ((PrismSize - 12) / 2) - 0.5);
 
-OffsetZ = (Z / 2) + (PrismSize - 12) + 0.39 + 2.2;
+OffsetZ = (Z / 2) + (PrismSize - 12) + 0.39 + 2.7;
 
 
 module prism (pos = [0, 0, 0], rot = [0, 0, 0], scl = [1, 1, 1]) {