In general, a a lot quicker sweep will see bigger, further gold targets, but will are likely to miss out on tiny shallow gold. A slower sweep will have a tendency to drop sensitivity for the deepest targets, but will see little shallow gold a lot easier. Minelab’s GPX 6000 https://www.jk-green.com/forum/topic/77025/metal-detector-accessories-you-can%E2%80%99t-ignore