Extrusion cooling fan-holder/cowling for MakerFarm Prusa i3 - Version 3

Update 12/7/2014

Uploaded two new versions of the .stl file:

1. Should be the same as the original, but only contains a single object (some slicers have issues with multiple objects in a singe .stl file).
2. Without "manual" support structure; it must be sliced/printed with support turned on. I wasn't real happy with the support that Slic3r generated for it; particularly under the large horizontal overhang; I think it should have printed support under the entire surface, but it only supported the edge, and gap-filled to make the surface...

After using my "version 2" fan holder (http://www.thingiverse.com/thing:216229) for a while, I had two problems with it. First, it totally obstructed the view of the print head, making it difficult to monitor the first layer of a print. Second, the nozzle was a bit too small; it was so close to the extruder, that it deformed slightly from the heat.

I had actually gone back to using my first cowling (http://www.thingiverse.com/thing:213416) with the second version's mounting parts.

This 60mm x 60mm x 10mm fan holder/cowling is designed to replace the left side-piece of the X carriage (see pictures). This fan holder and cowling has that part integrated into the design.

It has no adjustments for position (that should really be a fixed location, dictated by the carriage and extruder), and holds the fan more rigidly than my previous designs.