I have to agree after just over 7 hours in a JetRanger today, I must be getting punished for something I did in my past life, but I have to ask the question................ Is there a seat anywhere, not limited to helicopters, that would be comfortable after any extended period of use? Even those massage chairs in the mall would turn your back to mush after an hour. All of the aforemention reasons lead to the same end. It's not the saets that were poorly designed, it's us that weren't meant for repetitive movements in confined spaces.