I figured I would start a couple topics on what I find to be most difficult with the Minelabs (Etrac or Explorer). I will be walking through a park and hear just the faintest audible sound. Thinking its a deep item, I dig a deep plug, only to find its a tiny bit of metal usually 1-5 inches down. Since the depth gauge usually is off on small items, it appears that way that it is a deep find. What are your tips/techniques to determine if it is a truly deep find, or just a small bit of metal?