I have an 1150 gs adv with a sargent seat and my passenger is not comfortable. She loved my gs non adventure. Why did BMW make the ADV so much less comfortable for the passenger? Any thoughts? I have the adv top box and like it but it's painful for the passenger and needs a backrest but to my knowledge there isn't one that just bolts on. Also the grab rail sucks! The non adv was so much more comfortable. The seat is fine and comfy. I guess what I need to do is come up with a good handle system and a good backrest. Any ideas or similar experience? I know you can switch to the non adv seat but that's a lot of work and expense I'd rather not go through. My girl loves to ride on the back of the gs just got make her comfy.