If it would get me to find more coppers under a carpet of 100's of nails, I'd do it lol
As soon as I do some parks, I will run it in conductive tones. I hear conductive numbers are more stable than ferrous numbers. But at a cellar hole where there are literally hundreds and hundreds of nails, I can't use conductive. The iron bleeds through and would give me that same sweet pitch like silver.