52mm Spindle Mount for MPCNC

This is a remix of Nellson's spindle mount:

https://www.thingiverse.com/thing:3546359

I wanted to make some tweaks to his work but I couldn't import his files into my OnShape so I thought I'd do it from scratch to learn about lofting.

The main differences:
- beefier connection to the mpcnc tool mount
- magnets are placed into pockets that can be sealed to slow the inevitable rust that happens to them
- the vacuum foot comes away from the ER11 part of the spindle without a fight now