Crealty Universal Spool Roller

You can add a roller by the extruder using my other design: https://www.thingiverse.com/thing:4779319

A remix, by modifying the stand for Crealty printers and the brackets (wider), in my case it's CR-10 Mini. You can resize it to fit other printer if necessary. See the remix source for more pictures and how to install the bearings (same bearings as inline skate).

This system also helps to untangle spool, when it happens the gravity roll it back to untangle it.