The windshield on my Pichler V1 is vertically adjustable by 2-3 inches. It seems that whether it's all the way down, halfway up, or all the way up, that the wind is beating up my helmet (and thus head). Relative height varies from being able to really see over the top of it, seeing a few car lengths in front of it, to seeing everything through it.
I've heard of guys cutting the lips off the top of their windshields to stop the buffeting (Pichler has one). Any comments on doing such a thing?