FBO plate over advancing

Couple of comments.
- I use something similar to post #34. Very accurate.
- I have found that most manufacturers quote dist degrees [ not crank ] on dist components. A vac adv unit I have been working on has a '9' on it; 9 dist degrees, 18 at the crank.
- the limiter plate is a clever design, should work ok, as long as it doesn't catch on something to cause it hang up.