Thanks for this upgrade !
It worked on my Alfawise U30, but the belt was nearly too short and I don't have Tnuts so it is kept in place by pressure from the belt.
Not perfect but it wasn't designed for my machine so I can't complain ^^
Also I had to overscale the knob and the body because the screw was stuck inside the knob on my first attempt
I used only OEM nuts, screws and bearings and with some adjustments it worked
Thanks again, my print quality is slightly improved