Some have said that they don't balance well in mineralized sand. I did have what appeared to be a hard time balancing it at a NC beach. When I would move the coil up and down from the sand, I adjusted the GB and could not discern a big change as I adjusted it. I finally just did the best I could to get a consistant, steady tone. I was told by one experienced BHID user that if this occurs, just set the GB in the middle and hunt and it would be fine. Hmmm. Anyway, when I did the best I could, it seemed to operate fine and pick up signals, deep, just fine. I was confident that if a ring was under that coil, that I would find it in AM mode. Disc seems to lose alot of depth, but was much quieter and stable. Perhaps I should have adjusted my sensitivity down a hair too. Hopefully I will get to the beach within a month or so and give it another shot. Gold is a tough man's search, so can't expect to hit it the first time anyway. I would love to hear the experience of others out there.