I have the ultimate 13"DD coil for my MXT and while I don't see any improvement in depth over the whites D2 coil its just as deep but it does hit harder on coins that are on edge. I pounded this old baseball diamond with my D2 coil getting silver at 8 to 10" deep then went back over it with the 13"DD coil and got 3 more silver dimes on edge at 10" and a silver Washington quarter at 12" on edge. It does cover more ground per swing when detecting wide open spaces, of course you don't want to use this coil in the woods. What part of Indiana you from I'm in the greenwood area. HH