Mark, I do have the 6” and have used it the last few days, after watching one of your YouTube videos. I’ve been hunting several old home sites full of iron. All I’ve found is a couple of wheaties and a lead bale seal. When I get in the iron this thing goes nuts! 20 to 95 and nothing consistent. Why is it doing this? I try to avoid digging when it does this but just can’t help myself and it ends up being junk. I guess it’s just a learning process. Thank you for your help.