The cylinder trim and accelerator pump functions also are also a good thing for the PC3 and looking at the maps for the front and rear cylinders to determine rich and lean qualities and what you want.
I was in the same boat so of the 2 close maps I used the richer, still the throttle was a little dead off the line so I enabled the accelerator pump function and went with the 90/10/30 setting then changed the cylinder trim at normal fuel front cylinder and 2% richer at the rear.
For me that was the magic note, and as close as I could get without a dyno. I am sure you results will differ.