Hello everyone, I am a one man band plumbing business in the Buffalo NY area. For about fourteen years, I have carried a Whites 2000/D Series 3 detector in my truck. Which I purchased from a customer for $25. Never understanding how to adjust it, just turn it on and listen for noise. Only used it three or four times in those years to find buried water boxes or sewer vents. This year after a lot of research this cold winter, I realized the potential of this little machine with a bigger coil. Recently purchased a Coinmaster 6/DBH on e-bay. And I have begun a search for the optional 15" coil that was produced for it. When the weather breaks, I plan to use them at every opportunity, for the experiance and finds. Whatever that may be. Ha! Ha!