Generally, a faster sweep will see greater, further gold targets, but will tend to pass up tiny shallow gold. A slower sweep will have a tendency to drop sensitivity into the deepest targets, but will see smaller shallow gold less complicated. On top of that, to be a start present, http://inquisnower.phorum.pl/viewtopic.php?p=750251&sid=aa65f24a6c78d97b3e0fe9a56c6667bd#750251