TronXY X1 Z-Carriage

This upgrade replaces the original metal Z-carriage that also carries the extruder motor.

The reasons for this design were both the not properly bent original z-carriage and the fact, that the raw filament touched the Z-leadscrew.

###Additional Things
The original design does not carry the extruder anymore. Therefore, it needs to be placed in a different spot, like on the top of the Z-axis extrusion, where [another design of mine](https://www.thingiverse.com/thing:2425144) comes handy.