About this 3D model
Like a few people on thingiverse, I have been using hardware store cord reels (PN 280-984 from Home Depot) for a filament spool. This is a quarter turn fastener to allow you to reassemble the cord reel after drilling out the 3 snap in fasteners on the frame around the spool. I can't guarantee that the dimensions will work with your particular reel but they seem to with mine.