I’ve never used all metal mode, so would the tones be set on disc mode? What in disc mode has to be set up for all metal? I guess if you were hunting for civil war relics in a field what settings on disc mode, and then switching over to all metal what would you do? I’ve always had awesome luck just with DE mode cause it’s still super deep, I understand the ferrous situation, because in some instances when detecting some other sites, some of the bullets I found rang in like a ferrous signal mixed with non-ferrous. It began to get annoying, because I was worried I was missing stuff. I usually kept my disc at 6, and 2F. I did great that way, but even having the new model F75 still has that ferrous issue, where some items shouldn’t sound like crap or have an iron tone along with the higher VDI numbers. I’ve noticed even coin hunting in trashy yards of 1800’s houses if you use disc even in the 20’s, sens at 75-80, it gets so noisey