Result
Guys Hi,
The result is that I have had to wind the idel screw in 2 and a half turns, to all but a 1/4 away from fully wound in!!, it was so rich it was behaving as if lean. I also found an air leak around the carb seal which wasnt helping. Solved with bath sealant!.
One word though, the pinch test in this instance seemed to mislead me in fixing this. With the idel set up great as per the pich test, the pickup was still very rich.....interesting eh??
The engine is now performing very well on a 10x4. I have tried a 10x6 and 11x4 but just cant seem to get the RPM or the vertical performance. I'm happy with what I've got.
All is well and thanks for the feedback.