Took the D2 WS6 master to an old sports field, that I have hunted off and on for 15 years. I thought I pretty much cleared it out with my deep seeking Fisher CZ5 and Cz70 . The Ws6 master is so much faster with its DD coil . Especially with co-located targets. I dug 10-12 wheats 1 silver Rosie. And 6 nickels!!! Now CZs are known to be excellent nickel finders !! I believe the CZs Concentric coils are the reason for these targets I found . The conical shape detection field allows for masking with the CZs missing ( masking) targets !! The XP DD coils blade detection pattern just flat out performs the concentric coils !! All the targets I dug were 7-10 inches deep with old rusty iron bits very close. Just some interesting information for all to take notice about. HH Tony