here's a link to some dizzy tricks, the slot degrees are listed
http://www.network54.com/Forum/136503/thread/1091991614/Link+to+Duraspark+distributor+recurving+instructions...
keep an eye on that shrink tubing, repeated contact can damage it to the point where it'll fall off and you'll lose your stop limit. pretty sure stock they come with a similar plastic bumper on that tab and they're always missing or laying loose in the dizzy
there'll be phantoms, there'll be fires on the road... and the white man dancing