I've found 8 gold and 1 platinum ring at the beach with other machines, but I never paid attention to what they read because I scoop everything that isn't iron in the sand. I bought a cz-70 from cometguy not long ago and I airtested those rings on that machine. All the womens rings, (except 1 heavy one), read as foil. All the mens rings (and the one heavier ladies ring), read as relic, so when he said a nickle reading could be a gold ring I didn't really believe it. Last week I was detecting a park with the cz and I found my first gold ring from a park, and what did it read as before I dug it? Yup, a nickle. Now I'm standing here before you and cometguy with mud on my face for not believing. It was a 14k yellow gold mens wedding band, thin and plain (it only weighed 3.1 grams, but thats about $90. scrap value, which is a lot better that the ton of pennies I was digging before that). My cz doesn't airtest a dime near as far as some you say yours does. Is there a way to have the factory adjust that (remember this is a digital cz-70, not a cz-3d)?