Finally got my pattern down where i don't miss many nickels. Set the open screen which is #2 on the machine to300hz from 1to9 second bin nickels 10 to15 1000hz 3rd bin 15 to 29 700hz 4th bin 30 to 50 1000hz ferrous at 120hz bottom bin..This pattern works well in the machine gun pull tab area.or anywhere lets you know there's a nickel hit without looking at the screen.Tried it fo 2 hours at the fairgrounds today 17 beaver tails 2 v nickels 1899 1906 6 Jefferson's and 1 Indian 1902 1 wheat 1917 . this is open screen combine tones fast on ferrous coin .Been watching pin point with target trace i think i can get rid of digging half as many beaver tails by watching how it fills.