That study was done with only several razors in comparison so I would not recommend relying too much on it. These studies have a limited amount of credibility and the author has been inconsistent and contradictory with his reviews. Remember as well, that all of us have a personal preference based on what we have found to work for us.

I will normally test over 100 razors with a different media to get a feel for what is going on and how well something will perform before I comment.

Off the Norton, without going to the expense of a Coticule or Escher, etc, either .5 diamond paste or the Cromium Oxide mentioned are probably the best bet. You could also go to .25 Diamond, but the results have been mixed as reported by many people. The UF hone, or Chinese 12K are other options and both require a higher amount of strokes. The number of strokes will also depend on the razor at hand. There are also Shapton 16K and 30K stones, Japanese stones, an assortment of barber hones and not to mention the assortment of surfaces for the pastes including felt, leather, balsa, etc..

Have fun,

Lynn