I discovered a Confederate camp atop a hugely mineralized hill. My Eclipse 9.5" is essentially useless and registers brass as iron at 3 inch depth or more (luckily, I actually discovered 5 buttons at 3 inch depth). I borrowed a friend's 10" DD Coil and in a test, that detected buttons at 8 inches. However, searches are really noisy. So now I'm stuck between the 10" DD and the Eclipse Deepscan DD 1400 which I haven't tried. Anyone have experience with both? I also own the Super 12 and that thing fails at 2 inch depth. Did I mention this ground is highly mineralized? Thanks for your input as I don't want to make a $250 mistake.