This is hurting my head now, I have been able to master the LM carbs to get them to do exactly as I want them to do, nice low idle speed and full throttle control through the rev range but using exactly the same components in a G4 carb body I am unable to achieve a low idle speed. I have rev control, no problems, switch off ok but the idle speed is too high and there seems to be nothing I can do to lower it. As I said it is now hurting my head, I hate being beaten with this sort of thing. I probably have half a dozen G4 carbs here so I might be on the look out for some LM's if I can't solve this mystery