Cheers guys, usefull advice. When running in my engine it was quite inconsistent, as is not rotating, rotating on and off . I had my radio switched off so any servos should not have moved, the LSN was left at factory settings. It was visually about 1mm gap between the needle and the sleeve it slides into which i thought was fine. I believe winding this in makes it run more lean or am i wrong? Also the carb had a 1mm gap also which was recomended? Any views?