you will dig tiny pieces with the 7 KHz.With sorex, you want to be 17 or higher with sensitivity for depth, kick your gain lower to get stability. These Aka's run different but it will pick nonferrous out of iron better than my Deus will.It will id both targets when set right, it has happened 3 times that I know of, Im a believer. Any heart shaped full rounded loop hodo, dig it !It may be - id and bounce to low + id but dig it, don't pass them up.