Solidoodle E3D Extruder Assembly - Mashup Design Rev. A

**Edit: I have recently finished redesigning this thing, and have uploaded it to thingiverse here: http://www.thingiverse.com/thing:271506**

This extruder is a mashup of several designs, mixed with a few of my own ideas. It allows you to use the stock carriages for the solidoodle while having an E3D hotend with an active cooling fan. It is made to allow for easy removal of the hotend, and also has a built in wire guide for cable management.

I have drafted up some modifications to allow