which one goes deeper? i played around with both but in the all metal mode i saved my own personal settings by cancelling out the -10 through the 0. will this have the same effect as coin and jew. mode? can you sweep faster in the all metal mode? is it possible to have so much thrash that there is no humming when the threshold is set at 13? i went to a new spot that is a honey hole. i was there for 2 hours and found 3 wheat pennies, a 1956 silver dime, 1947 Canadian dime, and the normal p-tabs. the silver and wheaties were only 3 to 5 in. in my test garden i can get a good signal on the clad dime at 7 in. but i can't get a good signal with the quater at 9 in. unless i put it in the all metal mode and even then it comes up a 38 all the way to -10. do i have problem????????????