Drone bag charm

I recently bought a DJI Phantom 3 Standard. With that, I also bought a nice bag (backpack) in which to store and transport my drone.
I wanted a nice bag charm on it, so everyone would recognize it as a backpack which holds a drone.

I created this in OpenSCAD and made it a print-in-place with rotating propellers (why else have a 3D printer but to print something that is hard :-) ).
My printer is not that accurate, so I made the airgap (between the propellers and the body) .5 mm. Feel free to edit the OpenSCAD file and reduce the airgap (it is a parameter, so it should take less then a minute).

Enjoy and let me know (and see) when you print this.

Make sure to use the 2016 version of OpenScad!