Tom, If you find out what the deal is let me know would you? I stay pretty active with my job but last fall my shoulder seized up on me and after several sessions with a muscle therapist I can use my arm again but now my back screams at me at least twice a week. I'm doing yoga just to keep my whole body from seizing up! NOTHING compared to what passing kidney stones is like I've heard - my sincere sympathy - I hope Cherilyn makes it through alright (you guys too!). So I don't know. 40 must be that "you gotta smarten up now" or "sorry the warranty has ended" number or something. But nobody told me that was in the contract!