[FWB]

adjusting the throttle stops so that you get congruent readings on all carbs at idle.
that's where i start with mechanical FI, i'm sure its the same for the carbs too.
once your sure they all have the butterflies at the same point of closure, then you can start the never ending tuning which will change at the hint of your next door neighbors flatuation, and what house the moon is in.....