Hi all, I'm brand new and just getting my feet wet in the detecting world, I started out with an old Whites 1000, but quickly realized I'd better become a part of the compadre learning grounds. I ordered a new 8" model before Thanksgiving and before it arrived I wished I'd of ordered the smaller coil version, so I ordered two, actually ended up only being out of pocket for one as of now because amazon rocks like that. I don't know where to start, I'm even more confused than I was before I became compadre rich. The 8" arrived and I put it together, tossed some coins on the ground and beep! Beep, beeeeep, boomp beep.. Everytime I flicked my wrist this puppy wud scream, I was disappointed, it appeared I got ahold of a bad apple, it happens, so I told amazon, they refunded my money and I ordered the small coil version, it seems to work flawlessly, it has some of the erratic beeps but not anything like the 8" version. It's lighter and feels "less in hand" than the 8", it looks like it's been refurbished, it has had two serial numbers, one stuck over the first on the card, I know they have lifetime warranty, and I have to send one back anyway so since the 8inch was clearly malfunctioning I easily removed the two screws and the knob was raised up to one side, I didn't go any further but anyone have any suggestions on why it's so squirrely? I just got it, hate to send it back to tesoro so soon.