I want to figure out whether there would be advantages to cutting down on starch or if eliminating simple sugars already gives me most of the benefits.

The data I collected can't really unambiguously answer this question; subjectively, my 'mind-fog' seems to be most sensitive to the ingestion of simple sugars, so I think that is where the greatest bang-for-the buck lies.

Also, thanks a lot for sharing your data with us! That was an interesting post to read.

In most cases, I'm really not intelligent/knowledgeable enough to make good decisions based primarily on scientific theory. On the other hand, I am fairly conscientious and very patient, so I can get by to some extent by letting the world do the thinking for me (via cheap experimental results). I'm glad that you obtained some amount of value from it.