I was thinking also maybe velcro sewn to them and velcro on door around window. Just stick on when wanted and pull off when you don't. I heard screen works well when ran inline with direction of movement, almost acts like a solid panel to the air. Could be way off base on this though, I am no scientist. I may try it out to see if there is any difference.
And on the codes why would you not be allowed screen if it was just velcro'd on? It would not cause any safety issues, compared to windows down. It may even be safer kinda keep debris out of vehicle and eyes.
I am just looking for a better way to cool car than cranking windows half way down when I have my 68 yr, old father in car with me, he has heart problems and the heat really gets him. My 7 yr old also, I don't mind the heat too much better than being cold.
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