I'm doing fairly well on coins/trash down to about 2inches. I know when pinpointing a coin the sound is definite when coil approaches or leaves the coin. My question: what is the reaction when pinpointing a coin that is deep, say 4-6 or even 8 inches? Is it just as definite? Also is the bell tone just as strong when a coin is deep? I haven't found any really deep coins yet. Thanks for your input. Lewis