The wheelie is just a stand-alone quick way to sharpen and when I use it, I still touch up with the ceramic rods on the Steel master. If you search there's a thread on here some where explaining the magic angle (point angled down as opposed to horizontal, if I recall) The radiused file is for when they get really dull. If you get the Steelmaster sharpener it instructs you turn the clamp 90 deg. and use the side of the base as a file stop. This is correct in theory because you are resetting the bevel by removing metal at a sharper angle than you will be touching up with diamond or ceramic rods. But in my opinion, this is nowhere near as easy or precise as using the rods in the pre-drilled pilot holes. That's a breeze and it's all you need to begin with, as they come with a fairly sharp, albeit rough edge. I welded a guide rod on the end of the file and will use a Lansky clamp when I need to reset the angle, but I haven't tried it yet.