Interesting. About the Mjunit. Looks Well thought. Could you tell us some more info please?

-What is the sliding element? I can not figure that from the photos.
- v or u bearings ? balls like Hiwin?
-size/type timing belt?
-What the price for the setup you bought? Looking at aliexpress but all say same price, may be the price of an element
-Does it seem precise, i mean move smoothly and without play?