QU-BD TwoUp Upgrade

This is another attempt to upgrade on the cheap the QU-BD. In this, a remix of my first attempt http://www.thingiverse.com/thing:1101105 and/or adaptation of http://www.thingiverse.com/thing:1058861 and http://www.thingiverse.com/thing:177256 to use most of the electronics and hardware from the QU-BD 1/2Up. The extra hardware are some nuts and bolts #6 from my local hardware store, and an anUbis or E3D v6 Bowden, this keeps the inversion to minimum and you don't need to order online any other M2, 3, 4 or 5 screws, which are very hard and expensive. The rest of the parts can be printed in the QU-BD.

All the files have been coded by me from scratch in OpenScad using the original images as reference. Eventually I'll post everything so anyone can use the files as they want.

----------------------------- PART LIST -----------------------------

1) from any local hardware store (~$2):
- machine screws round head #6-32 3/4" and 1"
- machine screw nuts #6-32 regul