Flattening Complex Shape

I am trying to flatten this complex shape to route on my CNC. I’m not sure how to do it in SketchUp. Any ideas?shape.skp (195.1 KB)

Something like this?

I used Flattery which you can get from Sketchucation to do it. Note that before flattening it, I rotated a copy of the shape 90°.

Awesome! I going to get that, Thanks Dave