horn_c_dy= -4;
blhook_start_ang = 45;
-
+blhook_in_rad = 1.85;
blhook_str_len = 2.9;
-blhook_mid_rad = 3.5;
width = 20;
// computed
+blhook_mid_rad = blhook_in_rad + main_thick/2;
mc_mid_rad = main_in_dia/2 + main_thick/2;
mc_bl = circle_point([0,0], mc_mid_rad, 270-blhook_start_ang);