100mm Air Raid Siren

kcmj made a great siren. Tolerances were good. The parts fit together well. My dogs and cats became friends after I printed it. Life was good...

...until I went to the parts bin...

[DUN DUN DUUUUN!!!](https://youtu.be/cphNpqKpKc4) I didn't have a motor that fit!

What's a guy with [Fusion 360](https://www.autodesk.com/products/fusion-360/overview), [some calipers](http://amzn.to/2FNt88d), a [3D printer](http://amzn.to/2CUU9n7), and an angry wife to do?

[REVERSE ENGINEER IT!!!](https: