I put my $40 Walmart copycat Tracker in the closet-even left the batteries in it. So I took the knobs off, went inside and clipped the useless "kick" meter and glob-soldered an old 4" coil from an old Tracker I once had-before I tore it up trying to do stuff to it. It doesn't even have a leg stand, the PVC "half-pipe" sleeve I made for it finally broke off as did the foam I glued on an old Tracker shaft. Just got to wondering if it would work in a fair ground where iron trash and funky foil pieces drive the other detectors batty. Well, I got a lot of "clicks" in the audio but no crazy sounds, thanks in part to the small coil. This thing ate my "better" detector's lunches! Most noticeably were the two $1 coins and quarter in the same proximity. Of course the other detectors just went wild, but this combo was more believable on the tone ID, although I could still lift the coil 6" at medium sensitivity. Well, I guess I'm about to first solder the connections sort of professional-like, then add a phone jack-it doesn't even have one! Then, I'll put the knobs back on, add a foam arm rest, and "make" a PVC stand. Thanks for looking. Didn't mean for my toes to get in the pic!