Adjustable Blower-Fan Mount for Prusa i3 Greg's Wade Extruder (Tweaked version)

I tweaked the fan mount from http://www.thingiverse.com/thing:104688

I love it but added some usefull mods:
-Easy mount without fully unscrew the extruder screws.
-Added a housing for the nut M3
-Added a little more gap between mobile bracket.

*5/Dec/2013 Added link to more compatible fan ducts.

*27/Nov/2013 Added a beter fan duct for my J-head MKV (duct1.stl)
See pictures: PLA position (cold PLA and HotEnd) and ABS position (cold HotEnd)

compatible also with these fan ducts: