Filament Spool Hanger (Parametric)

I bought myself a FlashForge Dreamer as a spare printer, and I rather like it, except for the fact that it's designed for use with small internal filament spools. I have a bunch of colors of filament in larger spools. My solution to that is to drill two holes in the back edge of the lid, add a couple 6-inch Bowden-like tubes to guide filament from two spool holders on the back of the printer.

This design is one of those spool holders.

If printed in ABS, you can use Acetone to solvent-glue the holders onto the back of the ABS case permanently.

This should also work great for the Dremel 3D Idea Builder (which is a re-branded FlashForge Dreamer, with one extruder instead of dual extruders.)