Slightly redesign of alex.dunn's drill coupling for Miklos Kiszely's filament spool winder. This coupling is adapted to fit the remix of Kiszely's spool winder made by Damian (https://www.printables.com/model/478890-bambu-lab-filament-spool-winder-upgraded) as well as the upgraded gears (https://www.printables.com/model/478967-bambu-lab-filament-spool-winder-upgraded-all-gears). You will need a drill and a 3/8" adaptor.