taiyo typhoon hovercraft rotor

This is a taiyo typhoon hovercraft rotor that i designed up with the help of https://www.thingiverse.com/thing:2315917

The fan rotor on my hovercraft was cracked. most likely be able to get it to fit a bit tighter but this stl fits good and works perfectly.

I edited the middle part with tinkercad to get the keystone to fit to the right height of the motor

Simplify3D settings to print fins with the option "thin wall behavior" / External Thin Wall Type "allow single extrusion walls"
and "Single Extrusion" Minimum Printing width "100%"