This is as good as it's going to get:
Primary: Purple maxx perf SRX spring.
0,0 grams in heel
6,5 grams in the middle
6,7 grams in the tip.
2 hauck engagement shims
39 deg helix with a yamaha green sec. spring.
Engagement is about 3850. It revs to about 8000. Really good usable power for trail use. Seems to be "on the pipe" much more than with any other set up.
Hoping to see 90 mph on the dream o meter this season.