Ok, so, this seems to work, but it is very ugly and non-functional. Time to...

Ok, so, this seems to work, but it is very ugly and non-functional. Time to take another route at tackling the problem………

HeatSink.scad

@@ -211,23 +211,28 @@ module funnel2D() {
 // ff = funnel fin
 ff_str = hs_fin_w0;  // strength
 
-module funnelFins(){
+module funnelFins(
+  w = hs_w,
+  fin_cnt = hs_fin_cnt,
+  fin_spacing = hs_fin_spacing,
+  fin_cnt = hs_fin_cnt,
+  fin_w0 = hs_fin_w0,
+  _str = ff_str
+) {
   
   module fin(y) {
     module _fF(y) {
       translate([0, -y/2, 0]) square([x, y]);
-      translate([0, 0, 0]) roundTri((x*9) * (y/hs_w), y, 5);
+      translate([0, 0, 0]) roundTri((x*9) * (y/w), y, 5);
     }
 
     difference() {
-      _fF(y + ff_str/2);
-      _fF(y - ff_str/2);
+      _fF(y + _str/2);
+      _fF(y - _str/2);
     }
   }
   
-  fin(hs_w - 5);
-  
-  // for (y=[0:fin_cnt/2 - 1]) translate([0, y * (  fin_w0 + fin_spacing), baseplate]) fin();
+  for (y=[0:fin_cnt/2 - 1]) fin(w - y * (fin_w0 + fin_spacing) * 2);
 }