Well its been a while since I've played with my Demon, its still pig rich no matter what I do with the idle screws. The jets are at the baseline (stock for a Demon), and the power valve is good and set right for the vacuum I've got. My vacuum secondary spring is the stock one too. I was reading in the "How to Tune and Win" book and it did mention something about Idle Feed Restrictors in the metering block. Would that have anything to do with my problem? How can I make them smaller as the book suggests? The book doesn't do much other than that tho (not worth the money, but hey, at least I got one or two ideas out of it). Any thoughts?