I don't really have any idle problems. I don't think the secondaries are sticking.

They used to though. The secondary butterflies were rubbing on the intake manifold and getting stuck, and that was rasing the idle after a goot hard WOT run. But we fixed the allignment issue on the intake, and the secondaries seem to respond beautifully after WOT now, and the idle returns to normal.

How can I confirm that when at rest the engine is completely on the idle circuit and the primaries are not engaged at all?

I don't have access to the July 06 issue of HPP. I'll go see if I can find it on the newsstand, but last time I tried that, it was futile. Would anyone be willing to scan the article for me?