Slightly off topic.
I think some people's butts are just more suited to motorcycle seats than others. I'm not convinced that there's a perfect long distance seat to fit every backside. I was good for 3 hours on the stock seat. A Spencer mod raised that to about 4.5 hours. When I added an Airhawk, I was up to 7.5 hours (the longest I've gone so far). When I reach those limits I'm done. Granted, that's almost straight riding with minimal stopping (the 7.5 hours included a 30 minute stop for lunch). It just seems like the money I spend does offer improvement, but so far I haven't found the solution to all day riding with no pain. I really want to try one of the top dollar mods like Russell or Mayer, but I'm afraid I'll be shelling out big dough to gain an hour.