HyperCube X-Carriage - Integrated belt tensioner mod

First of all, a huge shoutout to both @Tech2C for his amazing printer, and also @bagwan for this cool tensioner mod that I really got to appreciate a lot!

###What is this?
This is a modification of the most current v1.2 X-carriage of the original [HyperCube by Tech2C](https://www.thingiverse.com/thing:1752766), which combines it with the [Hypercube easy Belt tensioner by bagwan](https://www.thingiverse.com/thing:2092237) built right on top, providing additional strength with bulkier walls an