Ocarinut fan duct for E3D

This air duct is for a radial fan (Jtron 40210020), directing air flow just below the nozzle for better cooling of plastic as it is deposited on a part in progress.

I made this after upgrading my Prusa i3 to an E3D V6 hot end, replacing my previous design for the J-Head. The fan duct attaches directly to the hot end's own small fan using the bottom two screws.

It has the shape of a donut and ocarina-style holes for directing air flow, hence the name.

The OpenSCAD file is included so that you can adapt the design to a different fan, change the mounting style, etc. (Mind the orientation of the part in OpenSCAD, it is 90 degrees from what it should be, due to the orientation of the E3D models I used.)