Here is a tip I figured out while air testing. The retune button does effect the discrimination mode. If I turn my Outlaw on in discrimination mode and immediately air test, it will only get 3" on a dime with the 8" coil. After I press the retune button all the way in until I hear the threshold hum then let off, it'll then hit a dime at 9". I'll bet if you detune while in no motion then switch back to discrimination without retuning while holding the coil off the ground that it will stay detuned. Obviously this will give a lot less depth.