diff --git a/bolex_90_degree_prism.scad b/bolex_90_degree_prism.scad
index 8adc38f..d8dde32 100644
--- a/bolex_90_degree_prism.scad
+++ b/bolex_90_degree_prism.scad
@@ -1,8 +1,24 @@
 
-PrismSize = 15;
+PrismSize = 12; //12.75 = original
 
-module prism (pos = [0, 0, 0], rot = [0, 0, 0]) {
-	translate(pos) rotate(rot) {
+X = 12.85;
+Y = 43.6;
+Z = 11.6;
+
+PostD = 4.3;
+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));
+
+OffsetZ = (Z / 2) + (PrismSize - 12) + 0.39 + 2.2;
+
+
+module prism (pos = [0, 0, 0], rot = [0, 0, 0], scl = [1, 1, 1]) {
+	translate(pos) rotate(rot) scale(scl) {
 		rotate([0, 0, -45]) difference () {
 			rotate([0, 0, 45]) cube([PrismSize, PrismSize, PrismSize], center = true);
 			translate([PrismSize, 0, 0]) cube([PrismSize * 2, PrismSize * 2, PrismSize + 1], center = true);
@@ -10,4 +26,30 @@ module prism (pos = [0, 0, 0], rot = [0, 0, 0]) {
 	}
 }
 
-prism();
\ No newline at end of file
+module bolex_90_degree_prism () {
+	difference () {
+		translate([0, 0, ]) cube([X, Y, Z], center = true);
+        //prism void
+		prism([PrismX, PrismY, (PrismSize / 2) - OffsetZ], rot = [90, 0, 0], [1, 1.05, 1]);
+        translate([PrismX, PrismY, (PrismSize / 2) - OffsetZ + 12.25]) scale([1, 0.9, 1]) cube([12, 12, 12], center = true);
+        translate([PrismX - 11, PrismY, (PrismSize / 2) - OffsetZ]) scale([1, 1, 1.5]) cube([12, 12, 12], center = true);
+		//remove corner
+		translate([-X / 2, 0, Z / 2]) rotate([0, 45, 0]) cube([2, Y + 1, 2], center = true);
+		//post void
+        translate([(X / 2) - (PostD / 2) - 1, (-Y / 2) + (PostD / 2) + 1, 0]) cylinder(r = PostD / 2, h = Z + 1, center = true, $fn = 40);
+        //post void bevel
+        translate([(X / 2) - (PostD / 2) - 1, (-Y / 2) + (PostD / 2) + 1, (-Z / 2) + 0.4]) cylinder(r1 = (PostD / 2) + (1 / 2), r2 = (PostD / 2) - 0.1, h = 2, center = true, $fn = 40);
+        //angled cut
+        translate([-9.5, (-Y / 2) + (25 / 2), 0]) rotate([0, 0, 17.7])  color("red") cube([X, 50, Z + 1], center = true);
+        //rounded end
+        translate([(X / 2) - (PostD / 2) - 1, (-Y / 2) + (PostD / 2) + 1, 0]) difference () {
+        	translate([0, -8 / 2, 0]) cube([8, 8, Z + 1], center = true);
+        	translate([-8 / 2, (8 / 2) - 1, 0])  cube([8, 8, Z + 1], center = true);
+        	cylinder(r = EndD / 2, h = Z + 2, center = true, $fn = 40);
+        }
+	}
+}
+
+//color("red") prism([PrismX, PrismY, (PrismSize / 2) - OffsetZ], rot = [90, 0, 0]);
+
+bolex_90_degree_prism();