PABOWHNTER, I had to change from a 30" to a 30.5" draw. Bowtech sent new cams, but dealer didn't have a clue as to where to set the new cams,and with these cams never being on a bow they were not marked. Was thinking maybe this is where some of the unmarked cams are coming from. I dinked with it for a few weeks, put new string and cables on it, still don't think I'm grtting 80% l/o. The l/o does'nt matter to me because I don't like 80% l/o, but where ever its at now the Old Glory is a tack driver. I just figured put it back to specs. and it should be close. Haven't had any problems since. I think the Old Glory is the most accurate bow I've ever owned.