I built myself the infamous IKEA LACK enclosing for my printer, but unfortunately fell into love with the spool holder here: https://www.thingiverse.com/thing:3209211 . So I had to come up with something so that I could reuse the part. The original Ender metal part has an L-shape which fits nicely into the gap on the upper side so that no screws are required there.

The lower part is sufficient for 1 kg spools, where the higher version is required for 2.4 kg spools¹. I originally designed it with screws, but figured that printing the holes with an .8mm nozzle is not worth the hassle and now I use it without. It does not move now, anyways.

¹ Please be aware that the spool holder may not be ideal for 2.4 kg spools. Mine is too wide for the holder. But as it passed my entrance door, it now has to be used up.

Creality

Ender 3

No

No

.2

15%

It prints with a .4mm to .8mm nozzle. One may print supports in the gap for the L-shaped metal. It may be hard to remove though. I decided to print a brim to avoid any deformation of the shells.