hehe
I have ordered the rail kit from mjunit Link here want to build co2 laser cutter/engraver from scratch :) I think that is better than ordering theese systems.
Regarding the motors and drivers, I am a bit confused... There are a sh*tload of different nema 17 and nema 23 motors.
They recommend nema23 motors since they have 8mm shaft. And the kit contains 8mm couplings and mounts for nema 23. But I am lost here...so many motors to choose from.

What do I need to look after regarding motors and drivers?