The Bounder, Yes can leave the visa up to motorway speeds and the horrible bufeting has all but gone but not completly,personaly i am the wrong build for a gs rider having short legs 29 in and 5.8 tall so also have the low seat but may be about the same torso as you as you are taller.
My lip is fitted with about 3 in above the standard screen as i like to see over the top ok and can easily see 20 ft in front of the bike,also the tobinators seam to tilt the screen back and down .
I went out with the allen key to adjust upwards from one notch at the lowest seting and moved it upwards one notch at at time,when i got to four notches up it was a instant transformation and i then started adjusting the screen down for best results which for me was half way down.
unfortunatly the lip then touched the hand guards so had to trim a couple of mill of with the angle grinder ,result was that for me i am happy now to have long motorway blasts in reletive comfort,not possible before .