Printrbot Metal Plus MMU (Prusa Inspired)

This is my Multi Material Upgrade (MMU) for the Printrbot Metal Plus inspired by the Prusa MMU.

This collection of models has parts that I have remixed from:

Josef Prusa (I used his MMU for a base to make mine) https://www.prusaprinters.org/

SpannerHands (I used his MP spool holder to design the extruder mount) (https://www.thingiverse.com/SpannerHands/about)

Walter (I used his printable housing for printrbot extruder gears) (https://www.thingiverse.com/walter/about)

Please ch