e3d clone dual 40mm fan duct (kossel he3d dlt 180)

WARNING: IMPROVED VERSION HERE! LAST V4
http://www.thingiverse.com/thing:1292065

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NEW V3 here:
http://www.thingiverse.com/thing:1117487

*improved version here, for 25mm barrel and hex nuts:*
http://www.thingiverse.com/thing:1101236

This is a dual 40mm fan duct for e3d china clone hotend.
cools both the print and the hotend barrel, in a vortex fashion.
for guys who want massive cooling to print *fast*.
very easy to print.
there is only a small bridge for each part, it is p