I have a small ear ring post... Found with the Vaquero, removed something and used just about amounted to a 1/ 2 in gold wire, A Compadre 5 inch coil found it.. A Compadre 7 inch coil, next to nutten honey. My second silver UMax, rolled it on the coil, no signal.. Vaquero inch and a half in air.. Discrimination was next to all metal status...Maybe this is why so many people are shifting detectors. Variation in targets.... Clay washer, I would have kept that Vaquero that does an extra dime inch...When I see a 13 inch air test on a dime, actually 15 inches ,knock off 30% in my soil we are cooking at TEN INCHES soil depth...There is a lot of technology to unlock "worked out sites". Silver and Vaquero had stock coils.. I may wind up with a custom made 20 kH coil just for small gold and chains. This is what a small piece of gold did, when I checked coils. No rhymes or reasons. If you have any ideas, fire away