Hello all , I have had my ctx 3030 for about a month and still learning everyday with it. My question concerns is about the sweep speed on this detector. In my test garden when I swing slow over a 9" dime It will only pick it up about half the time and somewhat iffey, If I swing at a fast speed it picks it up loud and clear, but I have read the machine works better at a slow speed ? So does fast equal better depth . My settings are sens auto 3 in coin mode. Thanks John.