Nozzle fan with snapfit for 50mm blower fan

In 2016 I've redrawn plasticWrap's nozzle fan design (http://www.thingiverse.com/thing:1106824) in Autodesk Inventor Pro 2016.  Good to learn a bit about Inventor.  I also tried as much as I can to make it parametric.  This way it was easy to adapt and tweak the design for my own printer.

The 2 most important changes are:
* The round cutout on the outside.  It is there because the design collided with my bed leveling sensor.
* I included the fan snap-fit idea I got from 3driven (http://www.thingiverse.com/thing:1131110).

In 2021 this one is still going strong on my printer.