Hi I guess I'll probably build something like this table here with linear ball bearings and a fixed gear shift which divides the steps of the stepper motor, so that I can have an appropriate stepping resolution for positioning. https://de.aliexpress.com/item/4001178550238.html
I'm aware of the trouble with parallel alignment of two linear rail bars, but I'm afraid I'll have to deal with it, for at least one of the axis.
I'll probably start ordering the parts as soon as I'm done moving into the new location next week and then I'll start extending the construction from there until I've got at least the x-y-positioning figured out.
The loading mechanism also is pretty annoying... Besides having to build my own custom guided ball bearing for the angular alignment, I'll need at least 4 customely made metal parts... :-/
Cheers -lev