The Innovate stuff reacts quickly. See what Mderoy can offer from his videos.
I never look at the logger at WOT except when on a dyno. Even then its just a glance as I'm focused on the run and the tach.
Screenshot overlaying two runs, vacuum secondary. You can see some big jumps within the trends. Prob represents cylinder to cylinder differences or ?
This a carb which has some problems with the secondaries. I confirmed that later by disconnecting them completely and the 3rd gear AFR became flat.