Started hunting with my new e-trac about one month ago---all in parks, lawns...etc...I just returned from a week in Ocean City Md. Talk about a clean beach!!! The first day I was there I hunted for about an hour and found two zincs and a token. I was using the beach mode. I was so desperate for a signal that I went to quick mask all metal mode just to see what Co/Fe #'s are in relation to what I dig up---sort of a learning experience. I was just hunting dry sand at the time. The next day I decided to try the pattern in Andy Sabisch's (De Marco) book--with that and a longer day I collected about three dollars in clad. The next day we had some beach erosion from Igor and that seemed to make a big difference. We found a few coins laying on top of the sand and I found a 14k ring with 5 diamond chips in that came in at a solid 12-04---we were hunting at the low tide line--had a close call with a large wave --too close--will be considering a waterproof machine for the future. What a great way to break in a new machine--dig as much as you can to see the correlation of the numbers( plus the sound) to the target. Had another solid 12-04--got excited--retrieved my first pringles top! My main question is: I am headed to the Outer Banks in October and January and want to cover more area and possibly get a little more depth (although I was nailing quarters at 12"). What coil would the members recommend in the 15" range. I am considering the Coiltek 15" DD WOT coil. Thanks for your help! HH