Hi recently aquired a Teknetics Version 5 noticed sensentivity gets unstable "chatty" right at 48 no matter of the coil i use or what location -- is this normal ? and no matter which of the 3 frequency settings . . i was watching a Keith Southern video on the Omega on youtube about the Ground Balance works in ALL Metal / Pinpoint but does not seem to carry over to the Discriminate mode --he adjust the GB control the full range from 0 to 99 and you dont get any ground feedback in discriminate --as you do in All Metal -- KS does say the Omega may use some kind of GB "window" in the discriminate range but didnt elaborate further . Just Curious-- where i detect here in North Texas --the ground is fairly neutral - so not really an issue