Here's a video i did of the X Steve  Sorry its so long but tried to get in the attributes in under a hour LOL. 50 gain and threshold 40 all potentiometers go zero to 50..disc point is where it just drops out AIRTEST DEPTH Nickle 14.5"  Indian Head 13"  Z Penny 13"  Copper Penny 12.5"  Clad Dime 12.25"  Silver Dime 12.25"  Silver Quarter 14"  Half Dollar 15.25"  Silver Dollar 16.5"  .58 Cal. 3 Ringer 13.5  C.S.A. Rectangle 23"  U.S. Oval 25"  Breast Pla