I have some info. about the Madstad and the Givi 260 screen... After speaking with Mark at Madstad, I drilled an additional hole in the screen - 3 1/2" above the higher hole in the current Givi... so that reduces the screen to the equivalent of about 18.9" - as the 260 is 22.4". My conclusion is that any screen used with a Madstad on a '12 'Strom needs to be about 19" to be at the same height as the Givi 260 was with the older 'Stroms.
I rode about 20 miles with it today at various speeds - up to 80 mph indicated, and it was pretty stable, with very minimal buffeting at the high end of that speed range... I plan to go for a ride with a group tomorrow, so I will have more feedback... one thing I wonder about the Madstad, and I probably need to speak with Mark about this, is: are there more of the well nuts available, as there are more holes in the Madstad for different positioning of the shield... there are 3 sets of well nuts (6 total - one on each side) that come with the unit, but I don't think they are removable so they can be moved... having the well nuts in the additional holes on the Madstad could provide more range of vertical positioning of the shield...