Tevo Tarantula X/Z-axis rework

First introduction

Printer: Tevo Tarantula, dual extruder, 2x E3Dv6 hotend and integrated layer fan

Problem: The printers frame limits x-travel

Solution: new x-axis, containing MGN12 linear rail upgrade. It keeps the frame and the size itself.

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Dual-z-drive is recommended. maybe it's possible with only one lead screw, don't know.
There are options to put the motors on top or to the bottom.

you need 400mm linear rods and LM8UU bearings, the lead screw and threaded rod from