I hear ya. But if my dirt was shooting out Indians with a ferrous reading of 01, I don't think I'd knock out the 01 line, just in case. Like I said, I've not had an IH come in with a ferrous that low. Lowest was 07, if I recall. But I've dug IH cents with conductive properties from 24 to 36 while running in both ferrous and conductive tones. Just for giggles, you might consider knocking out the 35 ferrous line instead of the 01, just to see if it is the effects of a "wrap around". If that takes care of the problem, I'd stay with it. JMHO By the way, don't give up that 77 IH. It took me 38 years to find my first. HH Randy