Spool Box Filament Guide 608 Bearing

This filament guide requires one 608 bearing, it doesn't have to be anything fancy since it just helps it sit on the threaded rod.

The idea behind this design is to keep the filament feeding off the center (or near the center) of the spool so the filament doesn't jump the spool and get bound up.

Running a long print with the guide configured as pictured has worked well and the filament reliably fed from the center of the spool.