Yes, to give the details:
Get a simple protractor at any art supply and mark off some triangle on poster board stock. Like 10, 12 15, 18, 20 degrees, I just have a 14 from which I visually extrapolate all other angles. Cut them out with an exacto. After coating with superglue, cleaning up a bit with sandpaper, you can then place them right on your stone and wedge the knife up against with the edge resting on the stone, and as you move the wedge along the knife's length you see just how much the spine needs to be raised at any given point from heel to tip.
It's no trouble answering questions when I have the time, and I often do, but l brouched this subject first time after awaking late night and just couldn't think.