Very interesting.
I've had the DFX go crazy while trying to find coins around old houses (using Best Data). Maybe correlate will help it calm down. In large open sports fields (Best Data) works like a charm.
The Barber dime I found with the DFX disappeared after the first silver tone. The only reason I found it was I chased the target in pinpoint (all metal). Even then, the pinpoint was off by a few inches.
I'm excited to try correlate!
Ridley