Resetting depends on how far they have "sagged" from new, and how well they actually work. I bought new ones for my S3, but on a Tojo I had, I got them reset by Pedders. They did an awesome job, not only did the car sit/ride correctly when empty, but they added a heavy duty short spring (cant remember what name they give this, but we needed it as we were towing horses around) and when loaded, the car only dropped about a half an inch from top hight. Didn't cost anywhere near as much as new springs, and when out in the bush, still seemed to have plenty of articulation,,well, as much as leaf springs give,,,

