I got lucky - Cylinder 6 intake was the culprit - no clackity clack! - now I can move onto the idle hunting.
I think it was because on that one I was doing it kind of blind - but I think I now have an understanding of how to 'feel' the guage into the gap. Bring the blade in from below then pull up till I feel the blade 'click' into the gap. One small step for man.....
Thanks for the help - super stoked that didnt take the whole day or longer - which is rare for me
