diff --git a/JUQS-collar.scad b/JUQS-collar.scad
index 394e282..db88cf6 100644
--- a/JUQS-collar.scad
+++ b/JUQS-collar.scad
@@ -26,7 +26,7 @@ rotate([0,0,0]){
    * OCTNR corner test (seems to also match OCTN, nice!)
    * shaft(shaft_r, pivot_depth, [cardinal_throw+1.95,0,45]);
   */
-  juqs(model = SQR, ver = VERSION);
+  juqs(model = OCT, ver = VERSION);
 }
 
 module juqs(model, ver) {
@@ -174,6 +174,11 @@ module oct_hollow (slope, shaft_r, depth) {
       sq_pivot(slope, shaft_r, depth);
     sq_pivot(slope, shaft_r, depth);
   }
+  hull() {
+    rotate([0,0,45])
+      sq_bevel(slope, shaft_r, depth);
+    sq_bevel(slope, shaft_r, depth);
+  }
 };
 
 module octn_hollow (slope, shaft_r, depth) {