I think we got a real winner with this machine. I took it to my most pounded colonial site. It's a small little site and I've been lucky to pull a cuff button from the iron every now and then at this site over the last couple of years. The D2 managed to sniff out 6 additional buttons and a knee buckle fragment. Hunted with a couple of Pitch programs most of the time but did manage a couple of buttons in Deep HC as well.

One of the buttons is a Continental Navy button! Looks like the same style as the one you found last November Dan.