I answered the questions in your email.
I should probably change the tuning guide but I've altered the lower and upper limits for the closed loop function. There is a separate table where we can adjust the "closed loop limit" which allows me to set an additional limit based on vacuum. So for instance even though the upper limit is 6k rpm it will not run 14.7 AFR up to 6k rpm under all vacuum conditions, only those I specify in the "closed loop limit" map.
I also no longer use "closed loop" under vacuum as it tend to run it on the lean side of 14.7 and it idles better on the rich side of 14.7.