Alan, I didn't see them do it. They told me the process, and I could see on the leaves where they had been heated. Burke Spring here in TH has been in business since the 60's. Great people, price is high, but you get what you pay for. I could watch if I wanted to, they like me in there.
Michael, if you have seen my RR's album with my rear setup, my rearend is very high and alot higher than the front when empty. With our old trucks, it can be a bear to remove the entire spring pack if you were to buy two new spring packs, I wish I kept my old 3/4ton rear leaves after I replaced them, I just threw them in a dumpster, I would use them now for my 1/2 ton power wagon.