Never used one myself but would say Pot #3 ("main fuel adjustment") needs to be turned back a bit. Especially with using the stock A/C. Sounds like your screaming rich at cruise range.
Just to add to this...
The pot #3 is for high speed fuel and unless you spend a lot of time above 4K, it isn't going to make a large difference in the MPG. The pots to make MPG differences in order of the importance is pot #2 and then pot #1