Got out for about 3 hours today same old ball field that I've found a dozen wheat pennies and 6 or 8 silver in the past. I used the 5.75 concentric. I only used disk 1 a little above foil that I dialed out a little piece of foil. Ran sensitivity at 9-10 and GB a little negative. I dug every repeatable signal some had a reverb sound when you pulled away and those were mostly tabs but the pennies did the same sound. I'm up 17 cents now 18 cents for the year. Lol I had a couple real deep signals that I chased and a few that I found the tiniest piece of metal my pro pointer didn't hit on only the coil would. I'll try the 12x10ws next