Powerful CTC Fan Duct

I highly recommend to refer to the NEW DESIGN which works a lot better
http://www.thingiverse.com/thing:2263781

- If you are making this thing and are happy with it I kindly ask to give it a shout!

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Update 2017 Feb. 4th
Old files removed.
Final versiones uploaded.

Modificationes:

- substantial noise reduction by changes around the fans and inlets
(less fan-stall/resonance, works like a charm now)
- support br