(No More) Auto-Rewind Spool Holder for RepRack [80MM Remix]

A narrower version adapted to the "drybox" design of the bottom cover for the Snapmaker U1 printer. Some changes list: The excess width has been reduced to fit a 1kg spool. The drum has been improved. The redundant winder has been eliminated. Once assembled, the spindle is locked in place (no longer falling out). The bearing socket has been improved. The original author is: Jerrari Buy him a coffee!