All the nugget hunting I have done with the Garrett ATX so far was done with the standard 10" x 12" DD coil that comes with the unit. That coil is a very good coil but as my story at http://www.detectorprospector.com/steves-mining-journal/gold-nugget-detecting-with-garrett-atx.htm illustrates it has a couple quirks. The best sensitivity to small gold is in the inner coil area so it is hard to get the hottest portion of the coil close to objects like rocks or stumps. But the main problem is the D