in terms of an air test on a current dime? Any air tests that I should perform when I get it? This will be a detector coming straight from Fisher....my guess they are being discontinued.... and I will be getting one of the last ones. I noticed that not many dealers have them on their websites.One fellow I know scared me by saying it's a piece of junk...because it's not a 1021 machine......... what ever that means.I have some faith in Fisher and I don't think they would selling them if they were poorly performing!! Hope I didn't make a mistake......anyone using the more recent CZ3d's ?? Or have any useful tips or comments regarding this matter? Thanx.