Interesting report. Question for you then : since you say that this comparative zone was below torn-out-bleachers, then were you knocking out foil and tabs? (in your quest for silver) ?
There was some arena grandstands in my city , circa 1920s to 1940s (various additions along the way). They finally tore them out in the mid 1990s. Because the grandstands was hard-pan soil. So you CAN BET it was a field day bonananza for silver ! However, the foil and tabs were an OCEAN of continuous signal. Doh! And the time-frame for hunting it was just a few days (before the bulldozers dug deeper, and it was all hauled away). So in that precious few nights, we cranked up the disc, and went to town digging silver and copper. But simply could not "be a hero" trying to get the nickels.
How would you say the xp-deus would have done in that cherry-picking sort of situation? better or the same as your tesoro ? I mean, is it just as adept (or superior) in iron disc, or also in a cherry-picking sort of situation I describe too ?