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Although I find these various nail tests somewhat interesting, 2 major flaws remain with these tests.
1) The nails are all the same level (height) on a horizontal plain. Which means, if you could raise a nail or group of nails to a greater or lessor height, the results would dramatically change. Which would allow one to manipulate the results. In other words, one would have to first ask, what exactly trying to prove with this test? There are literally, thousands of examples of nails and target positionings if you turn this into a 3 dimensional test, which, of course matches to the real world field matrix.
2) Even with the nails the same elevation on a horizontal plain, any nail ban be moved slightly in a parallel or adjacent direction, again, changing the results. It is lacking any international set of rules/guidelines such as size of board, length, mass and composition of nails. Also, size of coin and again composition of coin. One also has to ask how mineralization of the surrounding matrix of nails/coin would effect the final outcome.
Sorry for ranting on, but I have been involved with medical research, involving a triple blind drug studies, a double blind drug study and a life-saving E. coli O157:H7 (hamburger disease) intervention test. All these tests have extremely high standards. This nail test is really flawed in so many ways as I have explained. And we haven't even dabbled into the different characteristics of the detectors, such as operating frequencies, sizes of coils etc.
The coming reviews and test videos are going to be interesting. Had one on order but cancelled it after some early negative reports.
I saw it... something smells dead afterwards. Hey, I’d love to see the Time Ranger Pro in the mix on these tests. It’s another solid performer at a low price. I let mine go as a gift to the father in law. Slap that apex back on the counter and demand a TRP. 400 bucks.will be doing my OWN test today on way to pick up a Apex and Simplex.....