Your settings sound about like what I would use with the FORS or Racer, and I know some readers might find it interesting that a motion-based Discriminate mode was used instead of a "traditional" use of the All Metal mode. Honestly, I have used a motion Disc. mode more often than All Metal mode for a long time, when the detector provides a low-enough Disc. setting. That goes back to the Compass Gold Scanner Pro, which had a 'Vari-filter' [size=small](3-filter)[/size] circuitry design and a Zero-Disc. capability, and then the original White's MXT to the current MXT All-Pro which also just happened to be a so-called 3-filter design with Zero-Disc. capability. I also used an old Gold Mountain Technologies GMT-1650 or Cobra which had Zero Disc. adjustment.
I have a couple of potential Gold Nugget producing sites that I hope to hit this year with my FORS Co-Re and Racer, but they haven't been as productive for me in the past as what you're hunting. Who knows, maybe I'll get lucky at a site or two in Eastern Oregon this year for a change.
Best of success on your next trek afield.
Monte