As for the radioactivity, my dosimeter only has two lights and a clicker, but it appears to have about twice, maybe three times the background level or about the same as some arc welding rod I have.
I still haven't had the guts (literally) to try it again. Just holding it feels like a vibrator, even thinking about it gives me the creeps. It took about twelve hours for my stomach to settle. I don't know, maybe I'm just too sensitive now and I will get conditioned to it. I even worry that it may dull my natural dowsing sense. It's definitly the most powerful thing I have ever used. It's like dynamite. I don't even know that much about it. Huntley's instructions do talk about it having discrimination. Like I said, it took about five minutes to build power before I could do anything with it. I was able to locate my test target a couple of times. I'll try to get up my courage and try it again later today.