I set my E Trac up yesterday morning on a 1000 acre farm that I just got permission to hunt. Slave quarters, 1830's homeplace, old barns and buildings, 3 wells where quarters more than likely were located scattered across the property. Anyway I spent most of the morning surveying the place. Still have 3/4 of it to go. Here's the way I set my E Trac up. Two tone ferrous, Sunray X 5 coil, sensitivity pegged out, all metal.(woods hunting) Iron or nails thumped and anything conductive pinged out high tone. I'm slap tickled at my results while doing the quick survey (walking fast and just swinging the coil pretty quick actually) looking for anything of interest that might be a clue to come back later and hunt good fashioned. Running the E Trac that way doing a survey I dug at least 40 holes with both high and low tones just to see what was making it sound off in the woods. Dug about 10 square nails from 6 to 8 inches deep. Before I dug them I would hit quickmask where I had a pretty extensive disc nail pattern to see if it would disc them out and every nail nulled the machine before I dug it for verification. I hit one place where there looked like small aluminum can slaw anywhere from 4 to 10 inches in the ground and tested it too. Verified it by digging. Found 4 or 5 22 cal. casings anywhere from just under the dirt to the deepest one probably 8 inches deep. Hit a 06 empty casing at least 10 inches, gave off a high tone and pegged the depth scale out. I'm not a relic hunter mind you but it looks as if it will work superbly to me.