Z-Axis Stepper Bracket for TEVO Tarantula

A sturdy and rigid z-rod bracket for right (and optional left) mounting for TEVO Tarantula.

I wasn't happy with the other z-brackets on thingiverse, so designed this upgraded one to satisfy my requirements:

* Dual cross support for added rigidity.
* Back plate for added rigidity.
* Elongated screw holes for stepper motor, can actually adjust the Y offset!
* Low profile, so you can make the most of your Z space.
* Has both right and left side brackets.

I would recommend ABS, I have had PLA Z brackets warp over time, especially with ambient heat.