Yaa, thanks for the help Soarrich, appreciate the input mate.

It does sound strange when I think about it. As I say, this engine has ran faultless in my Hellcat for a multitude of flights and never missed a beat, it was only a few degrees off full inverted then.

Could it simply be just down to the carb being a bit lower than the fuel tank in this plane than the previous model do you think?