I actually have one of those.

I made some friends at Easton and I was able to pick one up. The part about paper tuning is really good. But I found the best results from digging into the Bare shaft tuning. My groups SHRUNK when I started doing this concept.
Dave Cousins, the Wilde Brothers, and many BIG Top archers do this technique. They get as extreme as shooting out to 90 meters with bare shafts. I have only done out to 20-30 and it is a big jump from basic paper tuning.
Paper tuning makes sure your rest is squared away. Bare Shaft tuning tunes your arrow and helps you make your arrow work for your bow.