I took Beachcombers advice and have been experimenting hunting with iron mask off this past week at some old parks and today at the beach. The beaches like the ground around here are very mineralized and hunting with the iron mask off in these conditions turns the GT into a smoother running detector with less nulling from the minerals and less falsing. Deep targets sound better and I can run sensitivity a bit higher and still maintain a steady threshold. I used the S-8 coil today and these finds were found under the fishing platform at the end of the dock that I've beat to death the last few hunts with the 10 inch coil and my regular settings. Most of the finds were 12 inches and deeper.