It's also hard to give advice when you haven't solved the problem yourself. I don't know what this "turbo 101" stuff is you mention Nick, but I'd be stuffed if I'd be checking the tension on my turbo nuts to fix an idle issue. Like Tab said, it's great you're having a go yourself, but don't tell others to play the same blind folded darts game you are. If you fix the issue and know what actually fixed it then of course let people know.