I'm not in the "Top Gun" category, but, for my use over the last 10 months, WAY too much has been made of the 12 ferrous line. What I did, was not try to out think programmers, and just try to learn the machine as it is.. I didn't use any of the factory programs, but did read parts of Andy's book and various posts on this forum. I started just like I did with my old XS. I air scanned all items that I had and that I wanted in my patterns. Using that as a starting point, I have slightly modified the pattern as time has passed. Reading about the different settings etc, I have experimented with the modes to a small degree. I didn't want to vary too many things at once, because then you never really know what made the difference in the machine operation. Keep in mind, I'm not finding 10-15 silvers every time out. ( 4 mercs and a rosie yesterday, and all 6" or more) I still have a lot to learn, but I have done okay finding nice old coins in areas that have been hunted hard by many people with a variety of machines, maybe it was luck, but I have the coins now and for me that is the result I'm after. Good luck with the new Etrac.