RE: Hind sight is 20/20
Big,
Rick Welch says so and I tried it and dang if it worked me too! One thing I have found with tuning is that it can be different for everyone. We all have such individual styles that no one method works best. Rick says add doubled sided tape one strip at a time until you get what you need. You then have the option of a hard pad, soft pad, thin pad, thick pad. A lot of playing around can get you in the ball park.
Remember that a thin, hard pad will make your arrows act more stiff, b/c they bounce more off the bow and that causes them to impact to the left. A soft pad will make them act more weak and impact to the right.