Prusa Research MMU2 improved roller

The Prusa MMU2 ships with 5 spool holders. I found that the friction for the spools was quite high compared to my previous homebrew rollers. I think keeping the filament friction down is going to be critical to my MMU2 success, so I designed a mod. Uses the same aluminum rod and bearings, with new endcaps and a 85mm piece of 1" Schedule 40 PVC. ~5-8x lower static resistance. Success!

https://youtu.be/8zz0S_d8xfU

Designed in Fusion 360.