FedEx dropped off the CZ 21 around 1 today and I immediately headed to the beach to try it out. I was actually able to finely ground balance. Nothing too spectacular about the finds today with the exception of a nail, yes a nail. The reason the nail was exceptional was because I pulled it from 19 inches deep in the wet sand. after I retrieved the nail I stuck the end of my scoop handle down into the hole and made a mental note of how deep it was and measured it when I got home. I knew it was deep and I was pretty sure it was iron but I wanted to dig it anyway to see exactly how deep it was. I'm kind of beside myself having dug it at 19 in. I also found a small piece of metal about the size of one of those little watch batteries and I dug that at about 10 in. The CZ 21 is now running much more like the old CZ 20 I had years ago. Before sending it out for repair I could run the sensitivity all the way up to 10 no matter where I hunted, now running it near 10 it's falsing. So here is one big thank you to First Texas products and Felix. I expected the machine to come back working better than it did when it left but 19in on a nail?.