Uncle Willie, I had a GTI 2500 for five years, I was verry brand loyal. But after five years of butt whippings from a xlt & a nautilus I came to the realization
that it was the machine & not me. In my frustration I called the factory and talked to a engineer to see what I could do different, the only advice he could give me was to change my frequency. The 2500 is a touch & go machine, you can't tweek it much, nothing to tweek. The things I liked about the 2500 were the
belltone, the imaging which can only be trusted to 6", the all metal mode that is deep, the arm rest, It was comfortable to use. The things I didn't like about it were It would lock up on you at 25 degrees or less, & belive me this was the last straw when my buddie Jim Weaver with his xlt was digging old coins left & right at a old tavern site, barber dimes,large cents, & a 2 cent piece. The battery tabs are real fingernail breakers, poor design, the treasure talk is useless. If you will notice when you find a coin with it that there is no iron in or around the hole, Its a cherry picker. It discrimates against iron to much. I could go on but I won't. But--- with all of this said, after 9 years of detecting, the deepest coin I have found to date that I could verify was found with this green machine, a 1936 quarter at 7 " laying flat in a old worked out park. This was my first and only whisper, I though they were a myth. Whatever you do if you hear a belltone whisper, dig it. My finds have gone up since switched to the xlt, with it I have tone id which gives me a different sound with every target depending on the conductivy, I can change my gain, recovery speed,ac sensitivity,sat speed, ect. Belive me this makes a difference.