So, after installing the Utopia Backrest, I no longer slouch so I sit higher, and the Givi screen is no longer tall enough for me, noisy.
So I got the Givi S180T Deflector and added that to the Givi screen. It works great, lots of adjustability, and no more wind noise. However, the Givi screen is thinner at the top where the Deflector clamps on, so in windy conditions, like on the highway, it can flap away annoyingly.
So, I reinstalled the OEM screen, which is not as tall as the Givi, but is thicker at the top, so it makes for a more rigid mount for the Deflector.
And it works great! Even though the OEM screen is shorter, I can raise it up enough so that I am looking through or just over the Deflector to eliminate wind noise.
I wish I had found this Deflector before I bought the Givi screen. I guess now I have a Givi screen for sale.