Ok, made the changes. File on thingiverse updated to reflect pin diameter, screw diameter, and added bevel for retaining screw. Here's pix of cad 3d rendering. Retaining screw diameter seems wrong but I don't have a picture of real McCoy to work with. If someone would like to be guinea pig, let me know and I can send physical object, otherwise I will test in a couple weeks when back at shop.