About this 3D model

**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 for better heatsink fan placement, but for now this design should work quite well. I will post pictures of the entire assembly when I can, because I just printed the fan last night. Thanks for looking!