I have found that making sure the seat is level when riding is important. I had a HawkGT with an aftermarket tail section. The foam I sat on was only 3/4 of an inch thick. I did several 300 mile days riding on it. I have also sat at picnic table for hours without discomfort.(there was beer, tho). No cushion!
IMO, sitting position, peg location and location of handle bars are all important.
One note, a friend of mine who is an Iron Butt member thought the HawkGT that I had sucked!
It just means, make it fit you.
Steve