RB,
Nope, still getting it wrong & Shrinker doesn't agree with this fact: a larger MAB starts the system later, not earlier.
If you bothered to read post #58 fully, you would have seen the straw/liquid experiment mentioned, which I posted waaaaay back in this thread.
From post #58:
' A larger MAB will admit more air to the emulsion system & that can increase or decrease the fuel flow to the engine'.
and...
The venturi vacuum in the well is reduced by the 'air leak' [ highlighted in the original ] from the AB & this reduces the pressure difference that causes the flow through the main jet'
He then mentions the straw experiment to explain how the MAB works. It is not that hard....