I have the stock BMW windshield (not the taller option). At 5'10" I sit at a level where the top of the windshield, when all the way up, comes up to about the bridge of my nose. Perfect, or so you would think. The problem is that the air gets a little unstable with some buffeting experienced with the shield up.
Is there a problem with the general shape of the shield? Has anyone replaced their shield with a same size aftermarket shield and found cleaner air? I see that most everyone goes a couple of inches taller and/or wider when purchasing aftermarket. I don't think I need a different size, just a different shape.