Parametric paint stirrer

A simple semi-parametric paint stirrer. The diameter of the model is 40mm. Adjust the following parameters to suit your needs:

1. radius - the radius of the overall stirrer. The one in the model is small since I had a 1/2 liter can that it needed to fit into.
2. fins - number of fins (for 6 or above, the radius needs to be larger)
3. thickness - thickness of the fins
4. height - overall height of the stirrer
5. shaft_dia - diameter of the shaft that will be mated to the stirrer
6. cyl_offset - thick of the shaft dia hole
7. angle1 - Angle of the fins at the outer surface of the shaft cylinder
8. angle2 - Angle of the fins at the overall radius of the stirrer
9. top_fillet - fillet radius at the top of the fins
10. bottom_fillet - fillet radius at the bottom of the fins
11. fin_fillet (optional) - if you'd like to add a small fillet to the edges of the fillet. This is not modeled and will have to be added separately.

*Notes:*

1. The thickness of the fins matter and