With my 800, If I get too aggressive with my Fe2 setting, and the ground is wet, I seem to find every rusty bent nail in the county, especially the deep ones. They sound soooo good. For my area I usually toggle between 2 as a low for good conditions, and 4 as a high if things are wet and rusty nails are jumping out of the ground. I rarely have to go higher than 4.
I've become very dependent on tweaking my 800 settings and tone breaks these last three years and missed that ability when I was testing things with my 540. Don't know that I would've missed it if I never had it in the first place (started with the vanquish).
The Vanquish is an easily likeable machine.
Dick