Low profile ducted fan for Mendel90 with E3Dv4 hot end

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:91931.

When I bought a new hot end from E3D-online I discovered that it wouldn't fit inside the fan duct on my Mendel90, so I redesigned it.
This duct is for a 60 mm fan and has a larger central hole and a slimmer profile, which allows it to sit underneath the nozzle cooling fan.
This version was created in Cubify Invent and is made available as a .FUN file as well as an STL file.