Planetary gear bearing filament spool holder for 30x30 and 20x20 extrusion

Vid: https://www.youtube.com/watch?v=qn0oaJO6jUU

Spool holder and bearing system I designed for use on the Wombot Exilis XL, will work on any printer using 30x30 or 20x20 extrusion in the frame (there are files for the bearing tower in each size).

Designed for easy assembly. Simply put the axle into one of the inserts and slide the universal insert into the spool, and slide the other insert in from the other side over the axle... the axle keeps them nice and centered and eliminates sag in