Extrusion cooling fan holder/cowling for MakerFarm Prusa i3

Note: I wound up making a 3rd version that I'm using now. (http://www.thingiverse.com/thing:228536)

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(See also http://www.thingiverse.com/thing:216229 -- Version 2; it's mount can be used with this cowl.)

Designed for a 60x60x10mm fan (what I had on hand).

Mounts to the X carriage using the existing side screw.
The "top" and "side" parts slide together with a tight friction fit, and allows for some forward/backward adjustment.

The cowling directs the airflow at the extruder