New Moto Guzzi Door Mats Available Now
I usually set my windshield height and leave it alone. Once in a while I lower it and realize I don't like all the wind on my face.
The windscreen shakes quite a bit, I didn't realize how much until I looked at the bike cam video, you can see the windscreen making a wave motion along it's edge from top to bottom.
I think you will find that 'wave' motion is camera shake more than anything.