According to legend, in a creek not too far from home, there are two gold bars from a stage robbery. Typical bars in these cases were 125 lbs, and would be about 8 x 16 x 3". I'm going to build a small raft, with a detector mounted on it. Said raft will be controllable by me, so it can be caused to sweep back and forth across the width of the creek as I wade behind it. I'd probably be 10-12' behind. because of barbed wire, and other iron trash, I need really good iron discrimination, and the siz