Many of you have probably watched the following video. It appears the Etrac nulls out over the nail when in pinpoint mode, yet does pinpoint the ring. This would appear to be quite a useful feature. I know the Etrac will pinpoint iron but in the presence of a non-ferrous object it appears it will null on a nearby iron object and pinpoint the non-ferrous object. If you suspect a good target in the presence of iron, wouldn't this apparent "feature" be useful in determining if you should dig or not?
http://www.youtube.com/watch?v=8aa7HJuWrMg
http://www.youtube.com/watch?v=8aa7HJuWrMg