+module SomeMidRounding(sq_size, z_extra) {
+ translate([0,0,-z_extra])
+ linear_extrude(height= main_height + z_extra*2)
+ rotate(45)
+ square( sq_size, center=true );
+}
+
+module PositiveMidRounding(){
+ SomeMidRounding(pos_web_thick*2, 0);
+}
+
+module NegativeMidRounding(){
+ SomeMidRounding(spike_web_thick*2.5, 5);
+}
+