Roland! You are correct sir! Swinging this F70 since April, the foil target id is 99.99% accurate. I got one little 14k w/ two diamonds and an opal off the beach this summer that rang in on the vid at 21 which is usually the foil top off a pringles can, yet it sounded not so "zingy"..makes me wonder how many others I didn't dig on the land. I think the big zingers are usually foil, and the soft zingers are usually smaller foil, the folded up gum wrappers read nickle, just like those danged ace bandage tabs do...I've been running wide open on the beach, and digging everything, but on the land I set disc at 15. Some old guy I met when I first got this detector told me to dig every pull tab signal, and I'd find the gold, well, he was right, I got two class rings (both returned) this past summer, but I have found nothing worthwhile in the 40's "ring" range... anything over 50 vid I'll dig on land, and all nickles...I still have not scratched the surface of what this detector is capable of doing, rarely ground balance, swing stupid wild, dont overlap, wander aimlessly...and have actuallly managed to find some stuff! a testament to the great product of Fisher!
besides the foil, those danged zinc pennys often turn themselves into a nice big ring with greater regularity...i can see why some fellows just shoot coins, and I can see where some fellows would just shoot quarters! All this junk digging really cuts into a persons time!