I was being sarcastic to Bob. As I have stated several times ground minerals will bump ID's long hair, but if one is 12 on nickels, it should stay 12, not have an 8 notch swing, 12,8,10,18, even some 20s same nickel same swing. I may go to another location or 50' over and nickels are solid 14s, pulls tabs moved up 1 notch to 16. I've hunted everyday this last year with this machine, even Xmas day, until you hunt 60 consecutive days, I'll choose my experience over theory. The page was intentionally said as 5 to see if "Bob" would catch it, he didn't. if I didn't know The machine, I wouldn't know it was messed up. When I say "rings" etc, I talk gold, silver and costume isn't counted, I know things about gold jewelry nobody has yet posted or wrote about on the xtetra. For example, the 18.75 gold coil will jump plus 2 on pull tabs. Because one side is larger within 1-2" when swinging length wise. How many thousands of hours do I need on ONE single machine to know when it's broke? I know you have a job to do but do you even own an Xterra?