Hypercube Z Carriage for LM8LUU

I've redesigned the Z Carriage in order to use LM8LUU bearings, as it fits better in my build, I think Z slides much better due to the "alignment" of the bearing.

There is a regular version, with the same size as the original, and a compact version, just a bit shorter so the Z axis is a few mm bigger :)

Clamps are the original ones, with M3 screws, and the other are the same M5 screws for 2020 aluminum profiles.