Hey all. I love my P.I. machine in the surf,but lately my "scoop elbo" has been hurting.I chest mount my CZ70 sometimes in the very shallow surf,and put it in a glad freezer bag. I run in autotune,and just switch to ID mode to see if it's iron.(saves my poor elbo a lot of pain) I got a "relic" signal that sounded very strong and when I didn't see any pulltabs after three scoops ,had an idea it was probally deep gold. Scoop number four brought up a beautiful man's 14k wedding band that fit me perfect! I need to get another CZ 20 or 21,I keep having visions of my CZ70 taking a deadly salt weter dip. good luck,happy hunting.