I went to a site, 1832 house, and found nothing over four inches. Came home set a target (dime ) in the ground, and ,at 4 inches, had trouble finding it with my Vaquero.The Compadre did better.AIR test, said 5.5 inches, on both the Compadre and Vaquero..Now, I get the sensitivity at ten and threshold maxed and golly gee whiz, am up to 7 / almost 8 inches in air..I max out sensitivity tonight and NINE to TEN inches on a silver dime.I was popping those cigar tokens out of the ground at six inches or better...I actually think the "V" is messing with me because it sat too long this Summer..I would like to send it in for a check up..Modified.Am third owner, so I don't care about paying to make sure it is close to detecting specs...Problem is Winter coming on.I have what may be some great old lawns,big open common yard surrounded by houses from the 1830's((great soil, sinks everything,) a corn field that may be packed with little yellow objects..Thinking seriously about another Vaquero as a back up..But, do detectors get mad like when you bring another one in the house? Can't do it with women, figure machines may be the same way? Buy a "V", and you keep it for me? Yupper....Rain is going to soak the ground tonight. Trying to see if I can upload some pictures of the cigar tokens.Will cut the grass Friday and spend the weekend seeing what's in the ground..Who knows, the tokens may be it?