Thanks Kenny, I had them set at 10 too, but I have now just set them at a tight 15, so I will see how that goes for a while.
I have also just fitted a new (police) regulator, it kicks in much lower than the standard unit, and is way smaller too.
But I am still having a problem with my left hand carb flooding when I turn the taps on? I have fitted new floats, new float needles, and I have just fitted new float bowl gaskets. I have tried it parked with fuel in the bowls, or running it empty, it still does it when first turned on.