Hello, All. Dave in Ohio. I've been fairly pleased with my Impact since purchasing the pro-pack from KellyCo last year. My negative issues this far have been minor: another short person's detector--Could someone please build a detector that extends far enough? Couple of inches of cable and some extra shaft? Not that big a deal, though a taller detector would be nice. My issue now, though, is significant: When I've been detecting for an hour or more, my detector suddenly goes nuts. It starts jumping through numbers and making all kinds of noise. Point it at the ground--crazy. Point it at the air--crazy. Power off and on--the same. New batteries--the same. Changing frequencies or adjusting isat--no change. Lower gain, different coil, switching programs--no help. When it starts to happen, I know it's time to go to my backup detector. So? Any ideas or similar issues? Any help much appreciated. And yes, I also got online and updated.