holder for filament spool keyring

Wanna show off all your precious filaments on your printer?
Well here is a solution for you!

Its designed for Ender3 but it would fit any other printer with those aluminium extrusions.

The rod is 25cm long which would theoretically fit 23 of these mini spools. It is already bending at this length so I wouldn't recommend making it much longer (mine is only PLA though) without adding extra holders.