I'm just now trying to get serious about finding deep silver with the E-Trac and it looks like I ran into some beginners luck! Went back to a spot where I pulled out 4 wheats, a Merc and a silver Rosie for an hour this evening in between rain showers. I didn't measure the depth but I'm guessing it was 11 inches down. I was getting a nice high tone 11-47 but it was intermittent. In an open Quick Mask screen it was bouncing down to 26 FE. I still have a lot to learn.
Thanks for the great advice on this forum!