QUBD OneUp/TwoUp Carriage and Bowden mount

Just a remix of Rcaslis QUBD OneUp/TwoUp extruder bearing holder thing 408818. Mushed version of Tech2C's E3D v6 Bowden X-carriage mount Prusa i3, now for the QUBD OneUp. ;-)

The left gantry mod is a remix from Stefan Burger. Other than the obvious I made the screw holes for the heads just a bit larger as I screwed my first one up trying to drill them out and went too far. Stefan did all the work, I just tweaked it to fit my needs.