Replacement Drawer/Cabinet Knob

TL;DR:I recreated a cabinet/drawer knob (Liberty's "Garrett" or “Classic Round” - they are both the same thing). It was a journey. I included a FreeCAD file and additional versions (largely untested) so it can be used/edited for use with with different standard screw sizes (Metric/Imperial) for convenience/versatility. No supports required. This is going to be a long oneRead at your own peril. You might just learn something. Why I made itSo we've had this knob in our kitchen that has been barely hanging on for literally years now, I think since we moved in. It's just one of the many identical, basic, round metal knobs that were pre-installed in our kitchen (for multiple cabinet doors). Upon seeing that Printables was holding a replacement parts contest, I looked around the house for something broken. I was reminded of this knob as it had recently fallen off the door again. The threading is stripped where the screw enters the knob, so it needs to be forced and then b