Underside fan duct to suit E3D hot end

I've finally got around to designing a fan duct that fits in the limited space under the extruder carriage when the longer E3D hot end is fitted.

This is a quick and simple print and only needs 4 x M3 screws to fit. It suits a 30 x 5 mm fan. You need to be using the updated centre_front piece of my replacement carriages (old versions of the rest are fine).

No idea if it fits with enough clearance for other hot ends. For much shorter/compact designs, I have my other fan duct on Thingiverse.

http://www.thingiverse.com/thing:154544