I tried a screen on the Rapide for awhile, same problem, the wind noise in the helmet was horribly loud and annoying. I guess the wind flow moving up and over the screen was directed into the base of the helmet. It was adjustable, however I could not adjust the problem away, so I sent it back to the supplier.
I have a small Puig screen on the Triumph Daytona 955i, it is nicely made. That one directs the flow of air at my upper chest, which is ideal. Leaned forward as you are on modern sportbikes, the airflow at 70 mph is just enough to counteract upper body wieght and take all of the strain off the wrists.
Glen