Spool holder with filament loop

I needed spool holders but I wasn't happy with any of the existing ones. I was inspired by the "Super Simple" https://www.thingiverse.com/thing:2165694 using ball bearings.

(https://www.kugellager-express.de/miniatur-kugellager-608-zz-8x22x7-mm)

This has five different parts (17 total parts) but the **only non-printed part is the ball bearing**. (It's probably possible to print a wheel that doesn't need a ball bearing but I haven't experimented with that.)

The wheel clips and wheels need to be printed in high precision, I used PLA and PETG.
I printed everything else in ABS. Nothing should need supports.

The clips should clip together like a stable 3d puzzle.

88mm seems a good size for 1kg spools and 54mm for 700g spools.

This is customizable in openscad (and maybe thingiverse). No libraries used.

Since the Thingiverse customizer seems to have a problem, I made two simplified scad files for customizing the width:

https://www.thingiverse.com/thing:3322488 (side