Hi all, I picked up this file at a yard sale for a 25 cents and and am wondering if it is a good candidate for my first attempt at grinding a blade. It is about 10" long and tapers from about 5/32 at one edge down to about 1/32 at the other. I'm thinking I've already got a nice even taper built into it... but, is it too thin at the sharp edge, or will it be after grinding off the teeth? Is this a million dollar antique Heller that I shouldn't destroy? Thanks!