Rick, I am using a CS as my main detector for the last month(It's my 3rd one). Here are my settings:disc99, threshold 0 or -5, sens 7, volume max, nothing notched, no averaging or tracking. Here is what I find most critical and do it often. Ground balance in all metal and lift the coil only a couple of inches high instead of the six inches the manual states. I scrub the ground and sweep slow. With nothing notched, it sounds busy, but this is how you must run your Explorer and Sovereigns. Check signals from different angles for repeatability. This is a must with this detector and if the signals don't repeat, you will dig loads of trash. Bottle caps can be tough, but they seem to high tone from all angles and the numbers jump more than a coin. The CS will lock on a coin and do it pretty deep. I can wade through the trashiest spots with the CS, even with the 8 inch coil. Last week I hunted a picnic park that is old and trashy. I have been here for the last 8 years with every detector made and every coil for these detectors. For the week I ended up with 5 Indian heads, 1 Barber dime, 2 mercs, 2 silver roosies, and 30 wheats. SLOW and REPEATABILITY is crucial. One quirk that I have experienced with all my CS's concerns nickles. Shallow nickles will lock on with mid tones and numbers from 9 to 12. Almost every time out with the CS I will get a high tone and a midtone with numbers that will be in the nickle range and then from another angle they will be in the zinc range. The depth on these targets in pinpoint showed about 6 inches so one day I decided to check them out. More times than not, these targets were deep nickles. This has happened with all of my CS. Also, deep coins will just be a tick with a number sometimes in the high teens or around twenty. Open a plug and check these out as when you open the ground, the signals will get more accurate and turn out to be coins. This is how I find all my deep(7 to 9 inch) coins. It seems that Tom's and my settings are very close and where I hunt, I hardly every change my settings and if I do, I only go deeper into the negative threshold from 0 to -5 or -10. Hope this helps. R.L.