Well I got tired of sitting in the house and had to try out the 9x12 I bought (and check to see if the ATP was still working after my trip to the lake). I hit an area I have gone over with my Ace 150 more than once and with the ATP DD when I first got it (my front yard!!!). Was really impressed when I dug up thirty coins!! None were silver or very old but they ranged in depth from 2 inches to 10. Either the Concentric Coil is the way for me or I am getting use to the music of the ATP better then when I first went over my yard. I think it's the Concentric Coil because I don't think I would have missed that many coins...esp. the quarters. Just goes to show...you can always find something where you have already been
