Every one is prob'ly tired of hearing this, but,,,,,, I tried my XT70 on some coins on a clear area of ground, and after sending it in twice, the numbers still jump all over, from iron to whatever. But I did learn one interesting thing, when I put it in prosp, mode (using the MF 101/2 in. coil} the depth it would pick up the coin more than doubled. I guess I'll just have to live with the way the XT70 works. Thanks for listening (if you did lol}