Thanks! I will try going back to the .033 and .030 MAB and see how it behaves. At least that's the easiest to change smile
If I can just stay out of the boosters until the transition slot is nearly 100% engaged, my overrich cruise should get better... I hope.

It occurred to me that the AFR might be going richer at higher load/rpm because I only have the primary blades half-open or less, and 3" of vacuum.
So it's acting like a small two-barrel and it's being sucked on really hard whistling

I could disconnect the secondaries and open the primaries to WOT. Bet it wouldn't be as rich at 4000+, and less vacuum too.