Mark, you are now the owner of a really deep detector and fairly simple one to use. The ground balance is crucial on any CZ so when you get that right, you will be getting all the potential of the 7 apro. I set my disc at 1 to try to knock out iron and I don't notch any segments. Start out with your sens at 4 and try to up to 6 if you can. If it is unstable at 6, be satisfied that 4 will still find the 8 plus inches deep coins CZ's are famous for. Use a slow sweep speed and overlap your sweeps .I think the only way a CZ misses a good target is because people don't overlap enough. It is hard to believe that an eight inch coil will punch so deep, but in my opinion, 8 inch coils are small compared to what the newer detectors come with. Just remember, I am just up the road if you want to sell it. R.L.