Ripshod
I was at the hardware store today and picked up some O-rings. The thinnest cross-section available was 1/16". I got some 1/4" diam. and some 3/4" diam. When I got home, I detatched one side of the shield, dropped two of the small diam. rings on the helmet's pivot mechanism and re-installed the shield. Didn't glue them or anything, they're just floating in there. I'll see when I attain highway speeds on Friday whether that extra tension in the pivot mechanism makes it any more resistant to the wind. This is just the first test.