Here's 2 pics of basjoos' false windshield.
(Basjoos, I hope you don't mind that I grabbed them from your photobucket page and shared it here.)
I like the curve seen when viewing the profile. Due to the additional slight curve in the other direction at hood and roof edge I think it ends up being a compound curve. My car also has curves going across the roof and hood's leading edges. In vinyl it makes a few wrinkles but I think in Lexan it may be another story.
