Timing Retarding @ high RPM

I think what the latest FBO, Revanator, and Pertronix III try to do is account for the slew. Inb otherwords it adds advance based on rpm to make up for known delay. Or FBO might simply be running the fastest stuff he could reasonably put in there. The Revonator uses patented technique that's been posted a few places. Something to do with triggering based off the previous spark. If there is interest I'll can find it and post which would be much better than my garbeled recollection of something I glanced at.