It seemed to me as I was surfing through the factory's website that there is a LOT of triangulation in that frame...no wonder it is so stiff
It'll need roll up (or electric) windows to keep my attention, though. The factory lit says only that windows, which few use, are an option...no mention if they are roll-up or not. The photos of the interior show what looks like a fairly large door panel, so if one were an engineer there might be a way. The Superformance coupe has roll-up windows...so it's been done.
Beautiful, for sure....no doubt the dimensions are spot on!
Cheers!
Dugly