Double Extruder Fan Channel

This upgrade is intended for any one running a MakerBot Dual Clone with MK8 dual heads with a single fan. My printer is a MakerBot Clone QIDI Avatar IV. I recommend printing this in poly-carbonate because of the high heat from the nozzles. There are two versions both work but the other one has more z clearance. Enjoy

Here is the link to my new design fan that places the air duct in back of nozzle and has a support to prevent sagging. http://www.thingiverse.com/thing:1542849