Just a humorous aside. I was detecting at San Francisco's Alta Plaza Park, which is an old park located in the Pacific Heights area. This is a park known for it's silver. Anyway, it was around 4PM, and lots of locals were walking their dogs and socializing as they do around that time. I got an interesting signal and was on my knees digging out a plug, when a couple of cute pooches came over and started digging along with me. The folks around me were bustin' a gut. And these two little guys would follow me wherever I went and dig along with me whenever I started digging. You gotta love 'em.