Prusa MMU 2.0 Filament Guide Shelf Mount

This part is a base part that uses parts from the Prusa MMU 2.0 spool holders to allow filament guides to be installed and dispensed from a shelf instead of the spool holders.

It uses the two guide parts (lever-a and level-b) from the MMU kit (https://manual.prusa3d.com/Guide/4.+Spool+holder+assembly/758?lang=en#s12451)

It is designed to mount to a 1/2" shelf using a M4 heat set insert and then an M4 screw as a set screw to hold it to the shelf.