To Everyone- who asked about the depth of the DP mode, and how it loses depth of 1 to 2 inches. Again, there is a misconception about targets and depth. I found a gold masonic pin less than 1" from the surface at a "hunted out camp". I also found a few coins and other items in heavy iron say an inch or two below the surface. With the DP mode, it will give you just enough information to dig the signal, whether it is shallow or deep. If you are in heavy iron, that slight "edge" so to speak will allow you to find something that isn't deep, but can be heard only by you. Sometimes the best finds are truly right under your feet. If you can't hear the signal due to masking, than you will do as possibly hundreds have already done, just walk right over the signal. So in regards to depth; Depth is a great thing but it isn't the catch all. We know about some of the deeper machines that can hunt this or that at great depths, however there is literally so much stuff under the first two inch of top soil that it would amaze the seasoned hunter. Proof in point, when construction is done on a previously hunted out site, the bulldozer removes the first inch of grass and top soil and the relics start popping out of the ground. The site is "a new" with relics and "keepers". Keep that in mind when you go to your hunted out site, and listen for those tones that appear good and start removing the first few inches of ground, than rescan the area. You might be surprised in what you dig at that site. Just because the area is hunted out, doesn't mean there isn't anything left. It means that some objects were not "heard" by other machines and it could also mean that a small 8" or 10" coil did not go over the signal. If you take one acre of land and figure out the mathematical formula to completely scan every square inch of that acre with an 8" loop, how long will it take you or anyone else to cover that complete area? An hour, day, month, year, or years? I would think the latter would be the most precise answer and this isn't based upon influences such as weather, pressure, solar storms, electrical interference and so many other factors.
In summary, use the DP mode, than any other setting you wish in certain areas. The DP mode is actually very good in heavy iron and moderate to heavy trash, the key will be once TK releases a smaller or in fact larger coil for the machine. Until then, experiment, and remember those two top inches of soil really dictate much when it comes to digging, remove them and you can hear things that perhaps before you couldn't. In my honest and humble opinion.