The SOV-GT is doing so well ,I love the sounds this thing makes, and how it nulls over iron , It has not been wrong one time ,-- when i get a repetable signal i dig and always out comes a brass or copper item , and over iron you may get a short zip but it will go away so i would switch to all metal and dig it and shurly it was iron every time . The all metal is so smooth, and when you hear the faint varyation it ssomthing deep ,this is a great detector , and the straight shaft is so nice to swing , minelab has been catching up to tesoro on the weight thing this machine is light It will bring lots of godies for me this field is just practice