Stagger jetting question

Anybody doing the staggered jetting on there open plenum style intake as per Vizards book? And why add 2 jet sizes to the pass rear of the carb when cylinders 5 and 7 are on the driver's side? Open plenum M1 max wedge port 4150 950 ultra hp carb

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I've stagger jetter dual planes, never needed to on a single plane intake.

The indy dual plane is the worst i've ever seen.