Tarantula++ obo Prusa

* update 22/01/17* Enclosure for electronic: http://www.thingiverse.com/thing:2055053

This is my design Prusa like 3D printer, largely inspired from Tevo Tarantula.
The goal is best accuracy and precision.

Main features:

Alu profile 2040 for frame and all axis
Printed bracket corner very rigid and making alignment easier
Rails for each axes (MGN12 from Hiwin)
Motors 400 Steps/turn
Dual extruder, dual hotend
Horizontal Y belt with only two pulleys
Z dual motors with leadscrew
E