My question to the group is, where are you finding some of these materials? Specifically the metals. I see Loc Nar working with aluminum spheres and c-channel in sizes that I've never seen at a store.
Also how are you working the toggle switches? Are you using a breadboard to create your own USB input?
Lastly, I found this and wanted to share it. A company in the Netherlands makes 180' (and larger) view projection screens for simpits. There likely is a company in the US and Asia that make similar. Icarus 180 Avenger

Thanks for any help available.