I've written a hull which in itself isn't dreadful, but which has revealed

fragility in the way OpenSCAD handles name collisions. This makes mixing
libraries highly problematic. Needs thought.

model/library/skew.scad

@@ -8,7 +8,8 @@
  * z along x
  * z along y
  */
-module skew(dims) {
+/* renamed to sskew to resolve name conflict with BOSL2 */
+module sskew(dims) {
 matrix = [
 	[ 1, dims[0]/45, dims[1]/45, 0 ],
 	[ dims[2]/45, 1, dims[4]/45, 0 ],