Rob, Bob, Steve and all Was that the 14" round or Wallaby you were using with those settings Rob? Because of the tiny size of the iron meteorites I've been hunting, many of which won't even weigh on a scale, the only coil I have any time on is the Joey mono. And that's a red hot little coil anyway. And I just ran normal, slow and 12-15 on the gain, and smoothe. Most of these are very near or on the surface. I normally run if fixed, but did try tracking occasionally during the day to see how well it would keep the treshold smoothe and I personally thought it did a tremendous job. But, I don't think I could ever change over to using tracking, and the ground I'm hunting doesn't warrant it's use. I did find the the sound of the 400 to be somewhat diffrent but easy to get used to almost immediately. Lots of basalt but it has a very distinct uneasy and gurgling sound that leaves no doubt as to what it is. The tiny irons laying near the basalt rang out loud so there was never a doubt. All in all my first day was most successfull as I intentionally stayed within an area I know has been pounded.