Sorry, I don't, but I wouldn't mind knowing a little about it either. I had a terrible time getting my General tuned and as it turns out, the cams were out of sync. In fact, now that it is tune, the top cam is not in the same postion in relation to the limb as the bottom is. Kind of bugs me because I always thought that they needed to be positioned the same. Shoots good, but I would still like to know.