Prusa MK2.5S/MK3S X-carriage Split-Back Mod

This is the Prusa MK2.5S/MK3S x-carriage back with the following modifications:
- back is split into two pieces
- removing the top piece allows easy access to the x-axis belt
- the bottom piece has a slit in the cable hole, allowing easy cable assembly/disassembly
- the x-carriage adds two nuts

I made the alterations on the original openscad designs from the prusa3d github https://github.com/prusa3d/Original-Prusa-i3/tree/MK3S/Printed-Parts/SCAD .
Some of the original SCAD code drove me