[Healeys] Carb Adjustment Epiphany

[Healeyguy]

A tried and true reference book, "Tuning S.U. Carburetters Including Full Needle Charts" indicates that the mixture is adjusted on multi-carburetter set ups by adjusting each carb for air flow (same for both carbs), idle speed, then mixture and verifying idle (tick over) mixture by lifting the pin on that carb. Then the two or three carbs are locked together on the throttle shaft. As we all know this only establishes the idle characteristics and the proper needle is necessary to satisfy the engine demands through the rest of the RPM range. The pin test increases air flow over the jet being tested thereby indicating whether the annulus (needle diameter to jet orifice) is sized correctly to obtain the desired result.  Relying on the balance tube (increased air flow at another location) to move air at the jet being checked just doesn't seem to make sense.IM(not so sometimes)HO. 
Aloha
Perry