Thank you for doing the test. My humble opinion, many rag on "air tests" as not valid, I disagree. I believer all tests, air and in ground have their place. True, an air test only tests a few parameters, but important ones. In my opinion, air tests are one of the few tests that are truly scientific, repeatable among all users and eliminate variables (assuming we all use the same method, settings and eliminate interference). In ground tests are the least repeatable and introduce so many variables (moisture, soil composition, mineralization, density, etc). A guy on the East coast could do an in ground test, hit a quarter at 12" and then a guy in Northern Minnesota due to high mineralization, may try the same test and only hit that quarter at 7!! I've personally never watched several air tests of a detector that just sucked arse and then everyone went out and was hitting massive depths. Watch some Dues or CTX3030 air tests and you see their air tests produce excellent results and that correlates with their infield depths. Ok, putting my soap box back under the bed...