I have added a new page with various charts and tables about how to select the proper timings on the Minelab GPX 4000, 4500, 4800, and 5000 model detectors. There is also a set of quick links to owners manuals and more. I have enhanced the charts with excerpts from the manuals where possible and will tweak this page as I have time. If anybody has any tips to add they would be appreciated by myself and others, I am sure. Minelab GPX 4000-5000 Manuals & Timings Charts