Had my x-terra 70 for two summers now(live close to Canadian border, so limited season). I have probably went out a total of 20 times hunting old farm homesteads. In that time I have found 29 wheat pennies, 2 Indian head pennies, 1 1940's Jefferson nickle and one buffalo nickle. Hunted about ten sites and found 0 silver. I have been lurking on here for some time and gained alot of info from the likes of digger, goes4ever, and mark in se ia. I noise cancel, manual ground balance and have threshold barely audible. Have been using 3 khz coil primarily, but have tried the 5 x 10 and small 18.75 coil to no avail. Have tried multi-tones and all metal, but seem to prefer goes4ever settings of pattern 1 and 3 tone. What in blazes could I be doing wrong. Seems odd that in this amount of sites and period of time I wouldn't have least found a little silver? Any ideas greatly appreciated!!