Best way to handle this issue is to model the panel and components in full 3D.

I have drawn up a lot of my instruments in 3D for my mosquito panel. It would be good if someone hosted a database of 2D and 3D CAD files of all the instruments, panels etc so we didn't need to redraw. I have drawn up the flarm brick, antennae, and several standard instruments that I could share.
Chris