Turbine cooling fan for RepRap Mendel

Finally, a fan that really BLOWS! I wanted a better option than the raft of 40mm boxer fan type cooling arrangements. Still a little bit of a work in progress (in that I have been using a previous version of this fan on my RepRapPro Mendel for the past few months, these files are the improved version)
UPDATE 28 July 2014:
Printed and tested. Definitely some trimming and fitting required to get the parts to fit properly. I put a small (2mm) spot of superglue on the motor plug to keep it i