Idle Transfer Slot on secondaries?

sccachallenger said
Do we assume you've adjusted the secondaries so they feed some air at idle?
This quite often allows you to close the primaries enough to get a clean idle with both mixture screws.
It usually doesn't take much of an increase to allow this to work.

No I haven’t yet done this yet! I am reading about that now in Dave Emanuel’s book now. Looks like that is a better thing to try before I do any drilling on the plate butterfly.

This passage answered one of my basic questions.