Replicator 2x Cooling duct and case lights

Replicator 2x Improved Duct & Extra Lighting
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This whole project started when I wanted to print PLA with my Replicator 2x. The first thing I did was to find an active cooling duct on Thingiverse. After trying a variety of them I settled on [this one](http://www.thingiverse.com/thing:228055). (I have to say, SSW, this model is fantastic.) Quickly after I printed and installed this duct, I knew it was going to be the one I