I have only had my etrac a week or so but ive dug a couple eagle buttons and a few minie balls. Anyway,i use relic mode,2 tone,ferrous audio,auto sens and im having trouble with square nails giving a good churp along with a grunt,i re scan and the same thing(i hate to not dig because i dug an eagle button about 8 inches deep that was giving the same audion response). I havent tried the quick mask feature and really dont understand exactly how it works so if anyone using the etrac for relic hunting has a few pointers id really appreciate it. Thanks-Kevin