The only part about sharpening the face of the tooth that bothers me is the fact that some of the carbide inserts that are in some of the saw blades are so thin that I would have a shorter life of the blade. I have been giving it some thought and want to make it so it will sharpen on the OD (outside diameter) of the blade. It shouldn’t make that much difference on the diameter of the blade but should give me a few more resharpes on the blade.