One can learn a lot from talking to guy's like Jerry & Tom D.One thing that I did not ask Jerry was, A friend of mine with a new CZ 5 and a test area on a 8" dime, he turned down the sens until he could not hear the dime and then turned it up slowly until he could just get the dime, now my friend sent the CZ 5 to Fisher for a check up and when he got the 5 back, he checked it again on the same dime, this time it would go one whole number lower and still get the dime, We used my CZ 3d and his CZ 5 and did the same thing, my 3d would go one number lower and get the dime than his 5 did. Does this mean that the 3d will go deeper than a CZ 5 ? The preset on my CZ 3d is a red 3, and if I remember right the red preset on a CZ 5 is 2, this make's me think that there is more of a difference between the CZ 5 and the CZ 3d than the wider windows or notch's. I will say that the CZ with a 5" coil has as much depth or more than some unit's have with a 8" coil.
HH...BJ