I though it might be useful to post the following link www.finders.com.au/forum/viewtopic.php?t=4827&sid=26f6fbb3336466185b4bbad7cff5ce56 (second post down) which has information on settings for a Minelab PI MD in quiet ground. Any Kiwi miners who use a Minelab PI in the extremely quiet ground of the New Zealand gold fields might find the settings are worth trying so they can get the best out of their detectors in the unique New Zealand ground conditions.
Also, some information gold detecting in New Zealand can be found at the following link "New Zealand gold"