Ok fellas....I pride myself on being a pretty intelligent individual. Pinpointing with this DD coil is perplexing me. I can get it to a general vicinity with the DD wiggle, but if I use the pinpointing feature, I'm all over the place. Rarely, do I not have to increase the size of the hole, I believe the times that I don't have to is just pure dumb luck. I would appreciate any hints and/or suggestions. On the plus side, I just ordered a sniper coil and it has an x on the spot....lol. I've been finding a lot of coins and artifacts with the 350 but would love to figure out the pinpointing.