NEW V2 - e3d clone dual 40mm duct, hex nuts and 25mm barrel v

WARNING: IMPROVED VERSION HERE!
http://www.thingiverse.com/thing:1292065

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this is a remix of
http://www.thingiverse.com/thing:1099666

with holes for hex nuts and 25mm barrel.

UPDATED V2!
now the mounting is easier, stiffer and the hex nut fit better.
the ducts have more air flow to the nozzle due to improved geometry and reduced flow to the barrel (but with an improved trajectory).