Here is my newly built MB-Bot/M Prime One Custom.
I designed quite a few "vitamins" to help me out. Like an enhanced X & Y motor mount,
direct drive extruder head, X & Y ends, belt anchors, stabilizer brackets, clip-on z stop.
Custom parts here: http://www.thingiverse.com/thing:1389905.
Prints pretty good considering it was a QUBD 2 UP and would barely print at all.
This is a great design and easy to build/modify, cheers to Diego!
I put up some pictures of my H-Bot Dual on Mega/RAMPS 1.4 with the "landing lights" on!
Check out my SCARA robot project here: http://www.thingiverse.com/thing:1571235