I made a couple of jigs to reset my Vari-Grind to various angles for my different gouges.

It is just a dowel and a block of scrap wood.  I flattened the top of the dowel so the knob will tighten snugly.  There is a flat face in the block of wood where the dowel is glued in: this face registerswith the corresponding part of the Vari-Grind.  The other important bit is the angle to register against the leg.  I setup my Vari-Grind and then cut that angle to match.