I bought a new etrac with two extra coils 6' an 15"x18" an of course the standard 11" ..For now just been using the standard 11" the problem i been having is a lot of numbers on one spot 12's 13's 34's 16's 20's on the fer side doesn't ever stick to one # Granted a don't really know how to use it property most the time when i dig there is nothing there i did find a piece of metal an a alumium pipe Been hunting in my back yard,,I just wish it was a little more stable.. any feed back would be appreciated.