I guess all this wind in the hair (if you have any) stuff is fine at lower speeds, but having been driving my Roadster recently just with side screens off I do wonder how long I could hang on at speeds much over 60 mph. The noise and turbulence seems extreme at 70 mph and this from a man who was happy to drive an M3W at speed. In fairness though I always used an open crash helmet with earplugs for anything approaching a long journey. Maybe this is the answer for the Roadster, although flyscreens would add a new level of turbulence.
