Filament spool holder with pencils and printed bearings

I wanted to have a second spool holder, but had no gear bearing (and not even matching screws) for the 'standard' Prusa Mini spool holder, so I looked around and found the simple spool holder by Schaefermakes. I wanted to improve that a bit, especially by adding some bearing for the spool and some slip prevention to the feet - so I added a 3d-printed gear bearing and used pencils with erasers. (While I got the inspiration from there, I made mine from scratch.)

Gear bearing for smooth operation: I found some good parameters for a 30mm gear bearing (using emmett's gear bearing from 2013) and added a rim to hold the spool.

Rubber feet: Use pencils with an eraser; those double as rubber feet. You need 4 pencils of about the same length of at least 14cm (when sharpened; small differences are ok) and one pencil about 5cm longer than your spool is wide (I used a 17cm long one for my 12cm wide 2kg recycled PLA Prusament spool). I had some unsharpened long ones, so the spool was quite high. sharpened pencils will stick out from the top a bit (my unsharpened ones didn't).

Easy to dis- and reassemble, doesn't use much space when not needed.

Note that I had only a Prusament spool to test it, so I don't know how well it handles other spools.

Admittedly, my contribution to this design isn't a mechanical marvel, but those planetary gears are on the next level - and put to good use in a minimalistic, yet somewhat elegant design (in my opinion).

Printing tips:

I used recycled Prusament PLA with 0.2mm layer height and a 0.4mm nozzle on a Prusa Mini+, also 3 perimeters with the holder part for stability. The gears came free easily, and after breaking them in they spun quite freely. 
The holes in the holder are designed for typical hexagonal pencils (7mm side to side). Those slide in with a bit of force and have good friction, so they don't fall off. If unsure, stop the print after a millimeter, test your pencils with that hex hole, and scale as needed. If the holes are a bit too wide you can put a layer or two of sticky tape around the pencil to make it fit. The bearings have a bigger hole and slide freely on the pencil.

You need two of those trapezoid holder parts and two bearings.