Agree with Dean - The oneway wolverine video was ok, but the varigrind video left a great deal to be desired- I had trouble figuring it all out, then I watched Doug Thompson's video (on his thompson tools website, I don't have the link offhand) From that I finally figured out how to create and form the gouge grind I wanted in the first place, and once I had that down pat, I took a little time to think about the various settings (Thompson had me setting gouge at 1-3/4" protrusion and pick a "wing notch" on the vari-grind and leave it there, for example, while Others say to use a 2 inch protrusion, etc.)
What I figured out was, I was able to set my WOLVERINE arm in ONE SINGLE position and leave it there (I cut a scrap of wood to space it away in case I needed to adjust or move it for something else) , and from that one position , I am able to do my 3/8 spindle detail, 1/2 spindle detail, my 55 degree ellsworth, grind, 45 degree "sorta traditional , almost 40/40" 5/8 roughing gouge grind, and my "almost 40/40" bowl gouge grind without ever moving the wolverine arm - all I do is change the "wing notch" position to get the wing I want, and adjust the protrusion depth of the gouge (from the vari-grind) using 3 scrap pieces of 2x4 - setting them to either 1-3/4", 2" or 2-1/4" gives me the different angles of grind, while the wing notches control the amount of sweep/roll of the nose - much easier set up, and it works great for me.