I like the simplicity and small size!
It printed easily with PLA at 195°C
The washers I bought in Austria were not the right size. I bought M8 x 20 - they were 1.1mm thick which was not enough.
Also the edge of my spool always slipped into the gap between bearings and outer wall.
So I printed the "washers / guidance" from here https://www.thingiverse.com/thing:365513
that works perfectly. Just make sure to place the spool with the filament pulling from below... because otherwise the
spool might fall off. In other words, the pulling force should be coming from as close to the ground as possible.
3D Jake Eco PLA