Filament Guide for Ender 3

thingiverse

This model is engineered to adapt to your desired location for extruding the filament. A simple slide-over installation is all that's required, as the guide fits snugly over the existing spool mount without needing any additional hardware. The holes are precision-drilled at a 3mm diameter, accommodating 1.75mm filament with ease. However, I haven't had the opportunity to test it with 3mm filament yet.