I missed your post the other day. The TID information may help, they are useless on the Explorer, but better on the Ace (go figure that one) so I was wondering how the F2 held up on it's tone response ie is there something about the way that a screw cap sounds off as opposed to a coin, or would the VCO pinpoint scream at you a lot more than on a screw cap than a coin (somewhat like the X-Terra's do). I know that this is a Fishers forum and are only mentioning these other detectors as a reference point as they are what I've used in the past, and am hoping that someone can relate to it. if someone can relate to how the audio system responds, I'd be grateful. There was a good comment made on the way that round targets hit the coil of an ID Edge the other day. The only catch to that, is it doesn't relate to screw caps. The coins that I like hunting most, come in the same area as a US 1 cent coin, if that is of any help.
Mick Evans.