Hi , always had a bit of buffering from the standard screen so tried the PP screen , but found that worse as it moved it to the visor and shoulders and cause a fair bit of wobble . Got me thinking as the standard screen keeps the wind off the shoulders/arms as its wide , so I cut around 45 mm of the top following the original shape and found it a great improvement and stopped the turbulence. Great improvement for me and works.
With a short body and long legs, I find the DP carbon screen in the lowest position perfect at all speeds. I'm not sure how the shape differs to the PP screen, but I've seen 174mph on the GPS with zero buffeting.
No issues to report on Rally model, in the higher position. I suspect it's different shape tot he GT model?
I think as you say its different and suspect higher , I personally dont like a tall screen as like to look over , not thro. The reduction and given me nice clean air and feels good and better than the PP screen , will have that for sale soon as well as the side deflectors.