I use the Silver as well and really like it, my test garden was set up with some Silver and clad Dimes at 6" and Silver and clad quarters at 8", and I couldn't hit any of them originally.... I made sure the auto GB was spot on by making a slight adjustment to the internal pot, per another post, then I got better depth on both Dimes and Quarters, the one Quarter on edge at 8" makes an iffy signal one way and solid signal at a 90 degree sweep, the Silver Quarter in the garden also at 8" isn't quite as solid as the clad but I'm still getting a good signal with the coil brushing the dirt.... 8" on Silver Quarters is really hitting the limits of my machine and it appears I can get another inch or two on the clad in my Colorado soil conditions the Silver Dimes at 5-6" is pretty much the max as well and a little better on the clad too it seems. I also get good signals on tabs down in the 4-6" range but not on the surface... and those darn screw caps sound good down to 6-8" as well....
I run my Disc at or below foil for most of the time as I am loathe to miss any gold, just one gold ring is worth ten thousand pennies, and that's alot of holes, so I dig a lot of tabs, what's a guy to do... oh well.... Up and down,up and down, up and down.... it's keeping my legs in shape, that's a good thing right?
My next purchase will be the Outlaw.... with the hopes of another inch or two of depth and interchangable coils with my Silver!
I wish they made the smaller EXcelerator coils for the Tesoro Epsilon series after reading some of the test reports from Kellyco, they seem to outdo many of the stock coils.....