PUREing is, in my opinion, the best method of 'spining' out there. You won't find a techier method, complete with before and after graphs of the path your shaft was/is oscillating on. After PUREing my entire set and comparing other sets vs. my PUREd set, I've noticed dramatic differences in consistency and have dropped 8 strokes off my handi since using PUREd shafts. I have much more confidence in my PUREd clubs when I see them set up to the ball.