I have the "Flextor" tool, and am in the middle of a research project in which I intend to compare the results of testing cane by three methods: a mechanical hardness tester, the floatation test of density, and the Flextor. I hope this will result in an article in the Double Reed before too long.
It's too early to tell if there is going to be a strong correlation between the three methods. I have tested a few hundred pieces of cane by all three methods, and am now having the results subjected to various kinds of statistical analysis.
Of course, the final determinant is the reed itself. If one obtains a great reed (an oxymoron?) from a piece of cane, then none of the statistical analyses make any difference. The only point of this research for me is that I would like to be able with some assurance to decide which pieces of cane to use and which to discard, so that I don't waste time on a piece of cane that isn't going to produce a reed.
I hope you'll be reading about my results in the Double Reed before too long.
University of Evansville