Well, for kicks and grins I took a couple chipper knives that I have to sharpen and ran them on my Rockwell hardness tester and guess what. The Rockwell hardness was consistent throughout the knife, from the cutting edge to the securement holes. I tested them in various spots as well. I mostly sharpen Bandit knives and on a Bandit, the knife clearance is set with the anvil only. The knives fit in pockets and are not adjustable. Matter of fact I have a Bandit coming in shortly that will need the knife flywheel reworked and the discharge chute modified as well. Again, when I sharpen knives, I always match them in pairs by weight.
One thing I don't need is a chipper, glad of that.
My saw log pile is getting bigger and bigger btw. Just added some apple wood to it.