I would recommend the Willard's for shaping. I've been using it for years. It hasn't come close to wearing out and is the right radius for me. I usually only have to shape 1 to 3 times in the life of a tip. One time if the installer didn't get it right. Second time, after a while of play I reshape to take care of any inconsistent spots. A third time if it is needed, though usually not. As far as scuffing with it, it used to work well when I've used it for that, although scuffing in general removes too much tip and greatly reduces the life of the tip.
For creating a rough surface to hold chalk, I absolutely and unequivocally recommend a gator grip. I personally bought the well overpriced Kamui, but the performance made me forget that. There are what look to be equal alternatives for a fraction of the price, and if I ever lost this one I would probably replace it with a lower priced model. As far as performance this type of tool is hands down the best, imho. It quickly produces a very rough feeling, non damaged surface to the tip. My tips have been lasting over a year of heavy play and frequent roughening without losing so much as a layer of tip (believe me, I've counted). The only reason they need to be replaced is they become too compressed. Using a scuffer, I was going through two to three tips a year and having to make the choice between the playability of a roughened tip or preserving the life of an expensive tip. Now I roughen it up whenever I need without any real consequence to the life of the tip.
Hope that helps,
Eric
Hard to believe that word is censored. LOL!
