- hull(){
- for (t=[0, tube_rear_extra_th])
- translate([0, -t])
- circle(r = tube_or);
- }
- translate([-back_ohw,0]) mirror([0,1])
- square([back_ohw*2, backflange_ymin]);
-
- translate([0, lock_0y]){
- oval(lock_or);
+ difference(){
+ union(){
+ hull(){
+ for (t=[0, tube_rear_extra_th])
+ translate([0, -t])
+ circle(r = tube_or);
+ }
+ rotate([0,0, backflange_angle])
+ translate([-back_ohw,0]) mirror([0,1])
+ square([back_ohw*2, backflange_ymin]);
+
+ translate([0, lock_0y]){
+ oval(lock_or);
+ }
+
+ hull(){
+ JoinCircs(0.01);
+ polygon([[0,0], lock_0, [-lock_0[0], lock_0[1]]]);
+ }
+ }
+
+ rotate([0,0, backflange_angle])
+ translate([-back_gap/2,1]) mirror([0,1])
+ square([back_gap, backflange_ymin+2]);
+
+ JoinCircs(join_cr);