Hey,
I'm synching my carbs for the 1st time and just checking to see if this is close to how it should be done.
First, adjust the air/fuel mixture screws on all four carbs until you get maximum RPM.
Next, attach my newly constructed YICS tool and synch sticks. Then adjust the butterfly adjustment screws until all four carbs have equal vacuum. First synchronize 1 to 2, then 3 to 4, then the first pair to the second pair.
Is that about right?