Couple of comments and observations based on some of the posted threads.
Pinterest, isn't that YouTube without action?????
Plastic why not metal? AKA Starrett vs Mitutoyo thread....
3D printed???? CNC no way no how am I ever going that way? Why not be a metal worker and make it out of metal???? Why not CNC your mill and play with the big and be environmentally friendly avoid one time plastics????
Up at this hour? Old ages equivalent of time zones, body is in one, mind is in another.
Al least its not Lithium Battery Powered.......No Nomex is required.
All kidding and poking fun aside, great idea for a manual mill. I only see fault which is flood cooling spray management or chip management. It opens the driver to these things.... Have a CNC mill it quickly identifies the management of these details.