There is no better way to set your own beach programming for the CTX 3030 than by reading Sabisch's CTX 3030 Handbook. Personally, I screen-out everything above an FE of 20, to eliminate iron and related junk, although you're screening out some Canadian coins and other low end valuables. When time is limited, I'd concentrate on the FE 11-13 and CO of 4-14 and 23-49. CO of 15-23 is mostly pull tabs, tabs, and aluminum. If you want to cherry pick, concentrate on FE 12 and CO of 4-14, and 24-34 for gold, and be aware that you're giving up dimes around a CO of 43-44 and quarters around a CO of 44-46. Gold rarely falls above a CO of 35, if it does it is a Whopper piece of gold and very rare to happen (less than 1/100 gold rings). Some caution, however, my own research has shown that gold can indeed fall anywhere along the CO range from 1 - 49. We're dealing with probabilities and where along the CO axis gold, in my case, falls. Found a very small gold ring (0.34g) at CO of 3. Last year found a small gold ring at CO of 17, that's pull-tab territory, and 12-14g gold rings in the low 30s. Happy Hunting.