Summary

My first design of the side extruder (http://www.thingiverse.com/thing:863327) deformed quite quickly, so I made one that has a bracket to secure it more tightly to the side of the machine.

I didn't like how the Ultimaker has essential stuff at the back of the machine, where you have difficulty reaching it. Also, I want to place it in a cabinet that is only barely deep enough, so winning a few centimeters there would also be nice. So, I flipped the extruder part around, and placed it to the right of the machine.

If you make one, please share the results!