Sometimes what we think we know we don't. What is the exact depth we lose by using auto sensitivity? How effective is the threshold adjustment to help nulling out? Will the frequency shift between Noise Cancel Band 1 and Band 2 help in bad ground. Could a decrease in the volume control with these other factors make a positive difference in bad ground. Not forgotten the coil size and the manufacturer. This is meant to be an extended post with information gathered by Sovereign users to help or eliminate various ground problems. Including electrical or magnetic interference. Your help is appreciated.