Printrbot Simple Dual Extruder

Dual extrusion for the Simple? Is it really possible? Honestly, I don't know but would like to find out.
Yes, I got a little crazy. Printed the prototype, but ran out of time and never installed or tested. Thought I would just throw it out there for anybody else who was feeling a bit crazy and may want to give it a go.
No warranty, no guarantee, you are on your own because I don't have the first clue about how to actually print with dual extruders.
If you try it, let me know I would lo