I made this filament spool holder for my enclosure. It can sit on top of it, allowing spool quick change, regardless of its size or diameter.
Technical
I built it using ABS and 4 ball bearings.
The base can be printed in one piece (Spool holder-complete.stl), but I chose to print it in 3 pieces for a better finish.
Ball bearings : 20mm (external diameter), 6mm (axle diameter), 6mmm (thickness).