About this 3D model

This is derived from nopheads Mendel Pulley with captive M3 nut, but has been redrawn in openscad, and added more nuts for extra grip. This part is also part of my OverlapStrap project which is licenced under GPLv3 see: http://www.gilesbathgate.com/OverlapStrap/ or checkout using git clone http://www.gilesbathgate.com/OverlapStrap.git