Filament Rollers for Creality Ender 3 v2

thingiverse

I've seem similar roller guides but I wanted to design one that will let me remove the filament from the roller without having to unload the filament from the hotend. This allows me to remove the roller while loading the filament if it's giving me trouble, then replace the roller. The top roller slides into one track in the top rail and it's designed to make it possible to access the other tracks if they're needed for another add-on. I designed it to work with a M3 x 20mm screw and nut. I included two different roller sizes. The upper roller can use the large or small roller but the bottom one can only use the smaller one. I designed them to not need any support during printing EXCEPT for under the part of the top roller that slides into the track. The bottom roller was modified a little after the photo was taken