From experience, having the windshield tilt out at the bottom would be super cool, and having that along with a crank down back window would be the pinnacle of cool! Rolling down the highway with side windows down is great, but some flow through would be a great addition. I wouldn't think that getting the windshield to seal against rain would be too much of a problem, but then I've not done it so I can't really offer anything on approach. I'll look forward to your progress, and hope you'll post as you go along!