I used https://www.thingiverse.com/thing:3020026 on my Sovol and Ender 3 Max Neo.

So when I took delivery of my first Elegoo Centauri Carbon (after they had corrected lots of little issues, etc) I still wanted a filament feed system that did not stress the extruder direct drive mechanism – so I wanted to remix this as it worked so well. Also, I wanted to retain the ability to detach the roller for different width models depending upon my needs. I want to do things that do not affect the warranty, but, greatly increase the flexibilty and performance of this printer.

I reworked the original and posted it.

Since then, I have also used some cardboard spools and found these like to ride over the slopes at the end of the roller and jump off from the correct alignment.

I have redesigned the Roller bar, Roller Bar Holder to have a much bigger flange at each end to stop this issue, and altered the Case mount also.

This then led me to alter the filament run out mount (seperate model).

All you need for this is:

2 x 608 bearings (per roller)

I hope you like this