Overhead Filament Spool Roller

Just another filament spool holder or better "roller", which is meant to be located above the printer.
It uses roller bearings and makes the spool turn real easy, but overall not too easy.

It supports Ø200mm spools up to a width of 76mm.
It has 5 fixation points, suitable for ~3mm self tapping wood- or sheet metal screws.
(I used 2.9x16mm acc. to ISO 14587.)

The funnel on one side is to feed the 1.75mm-filament down to the printer via a short piece of bowden tube,
held by a quick coupler. Tube has to be pushed all the way into the frame throu the coupler, to provide a low friction guide for the filament.

I used a 5mm thick casted acrylic plate to mount the spool roller and a M10x1 coupler.
There's an additional file for a small covering plate around the coupler, to help hide the threaded (and maybe additionally glued) area.

Spool roller is designed to go next to each other.
I was comfortable to have 4 of them, around 450mm above a 300mm wide print bed, which works ve