Went to a yard that I have pounded with my Etrac,ATP and ATMax. The last coins I pulled with the Max was a Roosevelt and a 45 War nickel in the same hole with 3 nails. Yesterday I pulled a 1920 Buffalo approx. 8 inches deep in a hole with two nails.read a solid 13 vdi. I plan on going back when I have more time and can tweek the Nox a little more.