I'm looking for a woman's wedding ring in a feedlot (horses)with my Quattro. I discriminated out iron,foil, silver, and copper. I would get readings for jewelry, and get the sound, but could never find anything. I tried low and high trash settings, auto and manual sensitivity, all metal, and coin-jewelry settings. I just don't know what I'm doing wrong. I read Sabisch's book several times last night. This place is LOADED with trash. I'm using a Platybus coil. Any help greatly appreciated. Thanks