We're finding nuggets about the size of a grain of rice for the most part, just tiny stuff, small pickers and flakes really.
I tested a few machines against the staple in a clean area out in the woods with no known RF interference and got surprised.
The Eureka hit the gold alone but would NOT disc out the staple within an inch proximity in all 3 frequencies.
The Gold Bug 2 gave the same results but at lesser depths but sounded great on just the gold.
The X-Terra 70 gave positive hits on the gold in prospecting mode and in all metal mode with minimum disk notched in. The depth was respectable too. 4 - 6" depending on what angle you approached the target.
The MXT found the gold but the sound was very questionable and the meter only read 22 at it's highest point, sounded very weak.
The GMT "old version" did a fair job on the nugget and staple combo but depth was minimal, 2-3".
Minelab 3500 .... now were talking about a gold machine, it would blow your ears off on this nugget and staple combo.
I watched a guy pick through a pile of dirt with his 3500 and get more gold than 5 other guys that were using high bankers.
So ... if the F75 is as good as you say ... I'm tickled
Mike