Well I went back armed with the 10.5, wish I had a video cam with me just one after another. SETTING: 10.5 coil, Primary NORM.DISC. 2, Secondary: Iron DISC. 9, SEN. 10 for threshold sound, VOL 10 , Sweep speed : Slow , average coin depth 8 to 9.5 inches, 14K gold ring was at 6"s, silver bracelet was about 11"s very heavy bracelet, again these areas I have hunted over and over with the F75, and these areas are where the rafts were the concrete anchors and chains are still there, seem BEEP & DIG is the way to go. Also NO chatter or clicks with the 1270 and the 10.5 coil, it was smooth sailing. Going back tomorrow. No coin newer then 1957.