I've been out with the Garrett Metal Detectors Axiom for about 2 weeks and whilst I've found a reasonable amount of gold with it, I'm discovering how important the settings are on this unit. I'm hoping to ask the people who are also running this machine about their own settings. My impression is that swing speed and frequency settings have the most impact on sensitivity. I can adjust the sensitivity up and down with less effect on response than changing 1 notch on the swing speed. Settings and s