catch_stalk_h = 5.0;
catch_stalk_len = 50;
-catch_tip_th = 5;
+catch_tip_th = 6;
catch_head_th = 3;
catch_pin_slop = 0.25; // each side, and above
catch_stalk_eff_bend_rad = catch_stalk_len * 0.75;
catch_strap_width = 12;
-catch_stalk_base_width = catch_stalk_h;
+catch_stalk_base_width = 15;
catch_knob_dia = 6;
catch_knob_above_gap = 5;