A few years ago I met a guy at Carlisle who had made a plexiglass wind diverter that mounted behind the seats. Sadly, I've lost his name and the photos that I'm sure I took. He said it worked great , and I've driven other cars with those things that made a big difference. My wife's MX5 is one and my friend's Z3 has one as well. I didn't see anything in the resource section , and was wondering if anyone was making them for speedsters or has any plans to DIY.
I hate putting the top up for obvious reasons, and it seems that one of these , along with a set of Troy's Cruising Windows would stretch the season a little.
Could be a Winter project that could be done in a warm place.