+holedia = 3.5;
+
+tongue2x = tongue2width - holedist;
+
+module Tongue(tw,tt,ad,slots=2){
+ y0=thick+0.1;
+ yn=ad-ridgewidth-strapwidth;
+ difference(){
+ translate([-tw, 0, 0])
+ cube([tw, ad, tt+strapthick]);
+ for (yi=[0:slots-1])
+ translate([-tw-1, y0 + (yn-y0)*yi/(slots-1), tt])
+ cube([tw+2, strapwidth, strapthick+1]);
+ }
+}
+