Rick Mayer and your butt
Enjoyed your report, always good to see someone using their KLR. I rode mine from Texas to Colorado last year and I think 500 miles in 10 hours at 100 degrees plus is almost as tough as doing the single track in the woods! Butt the Rick Mayer seat is the berries! I've had mine on two KLRs, rode from Phoenix to Fort St John, BC on the first one with that seat. Switched it out when I got my '07.
BTW, I've had three Rick Mayer seats (currently on my KLR and my FJR1300) and I highly recommend them. I'm not affiliated with his business, just a very satisfied customer.