Dual quads versus big hammer!!!...

I'm confused. The main jets have no affect on idle. So are you saying in that article they are cleaning up cruise by using staggered metering rods?

Also, what is your cruise vacuum? That is the number you should use to help you select the step up spring, or whatever they call it.
The vacuum has everything to do with idle and the step up spring. You want the idle vacuum to override the step up spring and hold the rod down in the fatter setting. When you give it gas and the vacuum drops it allows the spring to take over and push the rod up to the narrower setting on the metering rod and allow more fuel. So the primary Jets and the fatter setting on the metering rod have everything to do with idle as I understand it..