The major problem I find is the vibration, heat, and pressure points. Its my mid back that takes the beating, not to mention instead of resting on your butt...I'm holding and using muscles in my inner thigh more. Relaxing on a sport bike isn't my nature, and the constant angle my lower legs are at causes the blood to not flow as well, which causes the pressure points to hurt more. *I believe anyways*
I've come to the conclusion that its not my "butt" that needs the conditioning, it's my inner thighs and tailbone (from that wonderful stock shock). I've tried all sorts of foam padding tests for my 919 since my 1400 miles trip in 3 days...and the one thing that I found that helps the most is more support to the front of my inner thighs. But that won't help everyone since everyone's stance is a bit different.
I've looked into the kontour seats and posed the question earlier on the forum, no one seems to want to take the plunge or hasn't tested them yet. Not a big deal, but of all the seat options I've looked into, these seem like the best bang for the buck. I do know that if I get fresh air on the area it helps a lot (standing up a bit). I too would like to raise the seat for those mono-tone highway hours.
I know it sounds off but if you keep your back straighter, focus on more elbow control (don't have them outward so much to relax your upper shoulders), shift your weight to where you 'normally' place it (near the tail bone instead of near your crotch) you can tackle another hour on the highway. The bad side of that is the leg portion, it's not comfy for your knees.
D if you do, D if you don't...
I'm going to look into two stiffer foam panels that support my legs "inward" and allow fresh air to flow through...instead of my butts "outward" tendency with no air circulation. I'll report back some day...
I may not have a lot to say but it doesn't mean I don't listen.