The holes for the motor are slotted to allow depth adjustment.
The hole at the rear of the winder main body are slotted to allow for different lengths of the main body.
Parts required:
See the file descriptions for what parts go where.
The Fusion 360 file is attached so you can make changes if needed
The author remixed this model.
Added tolerance to the pieces for improved fit. Add threaded inserts. Added support for my shorter spool winder base https://www.printables.com/model/751805-awesome-filament-spool-rewinder-upgraded-2165mm-ma