Tevo Tarantula three-wheeled left gantry mod

This is a part that I designed inspired by the modular carriage by _MSA_ to make a stiffer z-axis as mine wobbles around as I don't have a double z-motor setup.

I haven't printed this mod yet (I'm on my way) but I hope that this helps to anyone with the same trouble as me.

I also added a back-support to put in the 4020 extrusions and make sure that they are squared with all the printer.

Except the base, all the parts are extracted from the _MSA_ design.

UPDATE 1 (19/08/2018):

I'v