Tension Nut Filament Guide

Try https://www.thingiverse.com/thing:737197 for a version with a flange.

I added a filament guide, based on my tension nut, so I don't need to worry about the filament looping off the roll on a long unattended print job. The tension nut is tight enough that it doesn't need a screw to hold it in place though you can add one if you need it.

The hole has a large fillet on both sides so the filament will pass through easily and the arm should accommodate various spools.

You can add a smal