Whilst most of this forum is concerned largely with reverse-engineering and thinking of how to use new functional methods of doing this; you Dane, are reverse-designing and doing an astonishingly good job of it!
That poor little car, probably never thought it would end up as a roof, dashboard and some quarters, held together with air.
What a fascinating project! Don't feel hesitant about posting what you have, it is just as important as the metal-shaping to follow,
Cheers Charlie