diff --git a/Makefile b/Makefile
index c85d0a5..e8532f2 100644
--- a/Makefile
+++ b/Makefile
@@ -37,3 +37,5 @@ head_corner_rear.png: bracket.scad bracket.json
 head_corner.png: bracket.scad bracket.json
 	openscad -P bracket.json -D 'part="head_corner_rear"' -D 'mate=true' bracket.scad --colorscheme Metallic --render -o head_corner.png
 
+head_corner_clean.stl: bracket.scad bracket.json
+	openscad -P bracket.json -D 'part="head_corner_rear"' -D 'plate=true' -D 'ring=false' bracket.scad -o head_corner_clean.stl
diff --git a/bracket.scad b/bracket.scad
index e1c134a..8402ed9 100644
--- a/bracket.scad
+++ b/bracket.scad
@@ -5,22 +5,23 @@ include <BOSL/transforms.scad>
 include <inserts/inserts.scad>
 
 /* [Params] */
-platfoot_x = 50.44;
-platfoot_y = 25.42;
-platmid_x  = 40.12; 
-headpost_x = 38.08;
-headpost_y = 38.08;
-footcrossyz = 38.08;
-headcross_yz = 25.00;
+platfoot_x = 51;
+platfoot_y = 26;
+platmid_x  = 41;
+headpost_x = 39;
+headpost_y = 39;
+footcrossyz = 39;
+headcross_yz = 26.00;
 footboard_y=19;
 footboard_z=130;
 LegOff = 18;
 LegGap=4;
 headcrossgasket=13;
 cornergasket=5;
+ring=true;
 
 /* [Render Options] */
-part=""; // [ none, head_corner_rear, head_corner_front, foot_corner_front, foot_corner_rear, head_cross_front, head_cross_rear, foot_cross_front, foot_cross_rear, head_cross_gasket, corner_gasket ]
+part=""; // [ none, head_corner_rear, head_corner_front, foot_corner_front, foot_corner_rear, head_cross_front, head_cross_rear, foot_cross_front, foot_cross_rear, head_cross_gasket, corner_gasket, head_corner_test ]
 model = "none"; // ["none", "corner_leg", "center_leg"]
 plate = false;
 mate  = false;
@@ -50,7 +51,7 @@ module screw_channel() {
 	fwd(80)rotate([-90,180,0])m4s_clear(bl=100, drop=false);
 }
 
-module head_rear() {
+module head_rear(ring=ring) {
 	blockz=headcross_yz+2*10;
 	difference() {
 		union() {
@@ -58,12 +59,12 @@ module head_rear() {
 				platfoot_x+16+LegOff,
 				headpost_y+footboard_y,
 				blockz], fillet=3, edges=EDGES_BACK+EDGES_Y_ALL, align=V_FRONT+V_TOP);
-			fwd(10)up(blockz/2)right(40-4)rotate([90,0,-45])rotate_extrude(angle=360) left(18) circle(d=10);
+			if (ring) { fwd(10)up(blockz/2)right(40-4)rotate([90,0,-45])rotate_extrude(angle=360) left(18) circle(d=10); }
 			
 		}
 		//%footboard();
 		headpost(y=2*headpost_y);
-		left(44)up(blockz/2)cuboid([50, 150,25]); // crossbar
+		left(44)up(blockz/2)cuboid([50, 150,headcross_yz]); // crossbar
 		// Screw Holes
 		rx = 5 + headpost_x/2;
 		right(rx)up(blockz-5) screw_channel();