Got my 26" Parabellum mounted today and took it for a quick ride. Seems to work pretty well. No buffeting but I am still in the wind at the top of my helmet. If I duck down a few inches, it is serene. I am 6'1" and have the seat in the lower position. Not sure I want a screen any taller than this one. I tried the screen in the upper and lower positions. Highest position was better but not purrrfect. Oh well...
Update: I ended up liking the lower position and lower seat position after a few more miles at different speeds/conditions.