And you'll be surprised at the difference it will make! I was struggling to make decent boost until Andy advised me how to adjust the rod.
Recently I've tightened my rod
a few turns more, and although max boost is the same at ~10psi it now boosts better (probably earlier) and drives nicer than it did before. A few more turns will up the boost to 15psi, but it's great to drive at 10psi - good, smooth power throughout the range.