Looking for some advise here!!!! So is it safe to say if the target Id bounces say 79-89-84 on a target it is junk, im finding signals reading 91 and sounds deep then pop the plug and there is foil sitting a inch down in the plug. This machine is starting to remind me of a at pro which is hot on foil and bottle tops, so should I only dig signals that stay within one or two numbers of each other? I never dug one slap of foil or a beer bottle cap with the etrac so this is getting frustrating for me. How can foil read in the 80's and 90's I just dont understand 2000.00 dollars for a wireless AT pro haha.