Paul,top archers that are shooting indoor or 3-d may not get too involved in the tuning stuff but archers that are shooting 70 and 90 meters do get a bit more involved.Why do you think they have arrows that get so close in the spine department.Finger shooters especially need this.The better a bow is tuned,the more forgiving it becomes and at those distances,I don't care who you are,you need forgiveness.