One-Up / Two-Up Bowden Extruder w/ Built in Tensioner

Just a slightly edited version of macattak's carriage. I had belt sag and didn't like using tensioners so I came up with this design, works great for me. You lose the top 4 holes, but I didn't use those anyway.

Update: Added an edited ubis hotend clamp that goes with this carriage. It was modified to use 20mm m3 screws (those are the longest I have).

Also, just so it's clear, all credit for these parts goes to MacAttak, I just tweaked them to my liking. Original parts here: http://www.thingiverse.com/thing:245617