KurtB,
Please read, if not already, Thomas Dankowski's Fisher Intelligence articles regarding the CZ-70, relic signals and Advanced Hunting Techniques. I used to live in an 1894 farmhouse. In my front yard, I dug a sold relic signal-turned out to be a silver war nickel. In my next door neighbor's 1883 house yard, got a solid deep relic signal over 4 inches that I almost didn't dig- a nice 1864 IH. I would definitely dig all deep relic signals-you never know what it might be. A CZ-3D eliminates a lot of the quesswork however, pulling many good midtone targets to high coin where many of the good CZ-70 relic targets fall. Old nickels-V, buffalo, etc bounce between foil and nickel. Indians can bounce all over. After a while, when you really trust what the CZ-70 is telling you, you just about know when it's something good from the bounce and sizing the target with response and pinpoint. JMHO...HH