After a short test drive at about 55 MPH, the difference was not noticeable (but it was a short drive) and the plastic was not being pulled up like it should have been (but, again, I may need to get up to 70 to see the real difference).I think I need to use coroplast with the amount of skin support that I have (or lack therof) because the plastic sheet is not making a smooth parabolic curve, but sitting high on the cross members and sagging/getting pulled down in between, causing vortexes. I don't really want to add more cross members (at least, not the amount that would be necessary to make a smooth skin surface) so coroplast it is.
Off to walmart... when I get around to it
