Boltless Ender-3 Side Spool Mount

thingiverse

This modified design for the Ender-3 Side Mount is inspired by DrStreet's original concept. To secure it to the frame, I replaced the traditional bolt and T-nut setup with a clever insert system that fits snugly into both the top and side of the rail. A bit of gentle hammering may be necessary to get it perfectly in place. By making the inserts slightly smaller, you could achieve a looser fit, but I aimed for a rock-solid connection so the spool holder remains completely still.