I have owned my 3d well since it came out and it has been my main detector since, i was just wondering what is the maximum sensitivity you have run before, my machine will false like crazy if you get any higher than 4sens, and i have detected all over MI. OH. KY. no mater where it ground balances. you get to 4 and it falses . That said it gets good depth everywhere i,ve been and i have found tons of great stuff. I just know that the hand me down CZ-7apro that i gave my wife to use gets better depth, you can run the sens up to 8 in the same area that i cannot get past 4, And the funny thing is we compare ground balances and they are the same. Now i'm not complaining i just gotta figure out why she keeps kicking my buttocks