80mm Fan Mount for Printrbot Jr.

I have a bunch of spare 80mm fans lying around, and wanted a quick solution for mounting one on my Printrbot Jr. to experiment with.

I goofed around with some of the higher powered fans, and luckily didn't break anything. I guess the max draw for the Printrboard is something like 500mA (?) so I put the lowest power fan I could find on it (0.20a). We'll see how this goes...

Looking at the Printrbot.com site, it looks like they've changed the extruder design included with the JR's. This i