Well, I just purchased another used large sebbie, and the first time I opened it, the lock hit the opposite scale. I took it apart, and right back to the same spot. I called CRK, so it is going back to the sauna today. I am interested in why this happened. One of the larges I have had for some time, that is gets hard use, it still dead on about 50%. I am sure it will get back to normal.