I got my new E-Trac in the other day...and today is the first real chance I've had to mess with it. I buried a coin garden out back to do some testing. It's not going well at all. I put all the coins at 5-6 inches deep....so they aren't exceptionally deep. I can not get the E-Trac to hit on the merc dime. I'm in the stock coin program, Auto +3 and can not get a hit on it. Nor will it hit on the Buffalo nickel. I'm pretty disappointed right now. Any ideas?