Thanks Tony! I learned that early on when I unknowingly hit a central Illinois park that I later found out that you and others had heavily pounded. Yet you were nice enough to leave me a seated dime and a handful of Victorian era jewelry and other relics. But I do believe there are some places that are truly hunted out, such as one church yard I worked for about a year where I've removed every signal in the entire yard-every nail, every pull tab, etc. Not even a peep with the big coil at max sensitivity.