A couple things I may be confused on..... is it chatter or is it the wavering tone that is suppose to be there when you are bobbing" the coil during manual ground balance procedures? Two, when you say it is much quieter after the GB procedure and when you go back to the hunt mode, as long as you don't run the sensitivity too high....... what numbers are you talking about with GB and with Sensitivity?
One last question.....with the X-705, why would you manually set your GB? Setting it Automatically is ten times more "precise" than we are able to accomplish manually. Another way to do it is simply put the 705 in Tracking mode. After a few sweeps, and when the coil is NOT over any target, shut off the Tracking. This will leave your GB set where it was at the instant you turned off Tracking. JMHO HH Randy