Bonjour !
I love this model but had a hard time getting it to work after printing because the friction of the gears was too high.
So the gears have been reworked to insert 12x8x3.5mm ball bearings. You can find them easily on amazon: https://www.amazon.fr/sourcing-map-MR128-2RS-Profonde-Roulement/dp/B0834RJ868
It works well and the sanding work is very limited.
happy printing !
The author remixed this model.