It takes a lot of work. Cam timing is one thing, and your limbs slamming home at the exact same time is another. If you got both timed, its a beautiful thing. I am not talking about what Arthur P put up there. When i say tiller tune I mean take a 1/4 turn out here and there and group tune and use you hearing to think if it made a difference. Each time you take out a turn, you have to readjust nocking point. I have seen some actually use a hooter shooter to do this.

But I have made up my mind, I am a hunter. If I can pull off 3" group at 30 yards, I am happy.