The pumping or bobbing method when setting your sensitivity in discrimination mode is not something I just pulled out of the air and is not something I came up with. This method has been used for many years by hunters using different brands of detectors in "bad" ground that varies from site to site and isn't unique to the Sovereign alone. Some call it "Power Balancing". Monte brought this technique to my attention a long time ago long before I picked up a Sovereign. It worked really well on some of my Whites detectors and I've used it through the years on other makes also. As I said in an earlier post this is just one method to set your sensitivity at the maximum your ground will allow and is more beneficial in bad ground than good. It is also just a starting point and you can then adjust your sensitivity further for the type of hunting you do whether it's Art's method to get the best signal on the deepest coins or using lower settings for iron or trash. If you have bad ground this may be helpful. If you have good ground and you can run your sensitivity at max anyway then this method is not useful or needed.