After installing a vstream windshield I enjoyed not having the wind against my chest but the wind against my helmet was still there, and that's with mounting it as high (and angled) as I could. So I decided to make extension brackets to reposition it. I added 1" to the top brackets to put more angle to it but it made things worse. I figured it was because the windshield was too far away to keep me in the bubble. So I made 1.5" extensions for the top brackets, moved the bottom brackets up an inch or so, and had to trim the "beak" off the bottom front of the shield to keep it off the headlight housing. That put the shield as high, angled, and close to me as I could get. As soon as I went down the road it felt like somebody was rapidly slapping my helmet. The air that was diverted up was coming down right on me.
Needless to say when I use it now, its back in its original position.
You're never gonna know unless you try right
Hopefully this will help someone else's curiosity