im having a [censored] up time trying to figure how to mount upholstered panels on the natural curve of the van. i also have huge aftermarket windows, just flattening it out with plywood would be difficult to make it look good because the windows would sit 3-4 inches in from my ply surface. i could just cover the windows with ply. is this what people do to flatten the vans curve? you lose 3-4 inches each side by doing that. also the corner panels and the transition into the flat is driving my crazy. please give me your panel installation tips!