Prusa MK3 Spool Holder Clip

thingiverse

A clip to keep spools from sliding off horizontally on the MK3's spool holder can be found here: https://github.com/prusa3d/Original-Prusa-i3/blob/MK3/Printed-Parts/stl/Spool-holder.stl. This clip features two small rounded knobs inside that securely hold it in place. Many people dislike the over-the-printer spool holder, but it works perfectly for me at this time.