I just got a Vaquero with the small coil and I was a bit leary of getting over 4 or 5 inches of depth with the small coil. I took this rig to the trashiest spot in my town on Friday and only had a couple of hours to hunt. I found a silver roosie and a merc buried in the roots of a large trees and they were at least 5 inches deep and the signals were loud. I ended up with a dozen more coins, with some 6 inches plus. I have used plenty of small(4 or 5 inch coils) on other detectors that I have owned, but none top this setup. I used a 5 inch coil on an Explorer and I believe that the 5 and 3/4 coil will do better. I can't believe the power of this little dynamo. Come on spring. R.L.