I was getting tired, so i switched to disq and wanted to see if i could get somthing non ferrous to come thru and i finnaly got a riging high tone i knew was not Iron , what i was picking up was the brass on the tip of the old farmers shovle, he aperantly fixed it by brassing a new tip on it and the GT rang it in proff that the farmer buried his stash somwere on bone hill , I also found a cut nails 18" deep the 1st one was 10" and then i got a signal in the bottom of the hole deeper still 18" another cut nails this is a strange spot