I'm back in town now and had a chance to inspect the bit on the truing tool. Jeff, it is just as you described. Knowing this I was able to approach using the tool with confidence. I was able to improve the condition of the stone, and then sharpen several knives. Although the stone didn't cut as fast as I remember from years ago, it did give me a sharp edge. I believe that with continued use I will get back in practice. Thanks for your help.