I’ve been using the nox for two years and I am not impressed at all with the depth gauge. Yes, i agree that you have to get right over the target to get a proper reading but i have found that the first four marks only account for up to 5 inches, not 10. As I am predominantly looking for silver I rarely dig anything that does not peg out the depth gauge at five marks. Even at that mark the depth of the coin may only be 6 inches. The response of the pin pointer is a better gauge, the softer the deeper.