Another Ender 3 Filament Guide

Wound up having to re-do my upper filament guide after installing a dual Z-Axis drive yesterday as the old one with the lead-screw bearing was no longer usable.

I designed this in Fusion 360 (file included) to allow a metal grommet insert which will keep the filament from abrading the edge of the hole in the guide and make things last longer. Rather than make it slip into the grooves, I decided to use some M4 X 12 Allen head capscrews and M4 T-nuts I already had on hand for mounting. This makes adjusting the position on the back side of the vertical support much easier and I made things thin enough the guide will fit between the vertical support and the Z Axis leadscrew without interference.

Print it with the mounting block up (top of the guide bar to the bed of the printer) and no supports will be necessary.