CharlStruder - fan shroud for 50x50 blower fan

I happened to like this extruder design, but there was no fan shroud design for a blower fan. Until now!

This is actually a third iteration of the shroud, I'm getting some great results printing (and cooling) PLA with it.

The fan i've got is from E3D (http://e3d-online.com/Electrical/Fans/50x50x15mm-12v-DC-Side-Blow-Fan)
The whole thing is also designed with E3Dv6 hotend in mind, may be too low or high for another.

2015-10-19 edit: I fixed the issue with the shroud mesh, should