Not sure if I'm ground balancing my Mod Idx correct. I have the instructions Mr. Bill sent with it. Anyone else have a problem balancing theirs? What is your procedure? I have a test silver quarter and silver dime buried at 6 in. and can't get a reading. The rest of my setting are normal, not too much power to overload. Won't even pinpoint at 6. Using 950 coil. Input would be appreciated......