Simple filament guide for - Modular Spool Holder

Edit: Added a new version of the single filament guide. This version allows for the use a ptfe tube to prevent rubbing against the spool holder leg! I wanted a basic filament guide but didn't want to use a different spool holder. So I made a super basic filament guide that allows the rails of this (https://www.printables.com/model/672811-modular-spool-holder) spool holder to sit on top of. I have two designs uploaded, one for all four filaments feeding into the center and one for each roll. This was super helpful with keeping them from getting tangled when retracting filament. Printed with PLA+ but really any filament should work fine. Use at minimum 25% infill as the center where the spool holder sits is quite thin and can break if not careful.