I read that article as well, I've also noted that Bobb Robb does it on his as well. I planned on trying it out this summer when I could shoot a little longer distances. Let me know how it works for ya.
If I were to do it I would start at my normal point then each of the next 2 would be 1/8 lower.
All 3 should be at a different height.
From what I've read and played with on gap between nock index and base of vane is that it doesn't matter a whole lot with flight but more so matters to the shooter. You don't want them to far up the shaft because that will screw up the flight but you don't want them rubbing your cheek either. It makes a difference with the height of the vane and whether you shoot fingers or release.
Genesis 27:3 Take your bow and quiver full of arrows out into the open country, and hunt some wild game.....