coinmaster 4000-D series 3 discriminator experience?

[diggin in Indiana]

Any body out there had experience with a Whites coinmaster 4000D series 3 detector? I just bought mine a few weeks again, and plan to start using it this spring. I've read the users manual and am familar with the adustments of the various controls and settings, but if anyone has used one, I'd appreciate some additional comments and thoughts.

 

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