Well, today I shortened the pipe setting to about 240mm effective header length and started with the fine taper needle at 1.5 turns and success. Managed to run a full tank going from rich four stroking to fast two stroking and back every few seconds. The idle was fast and I couldnt go lower on travel settings so stopped it to reset the throttle for a low idle. Refilled and had a b of a time getting it going again, eventually ran out of time, so will now wait until I get to the field and have plenty of time to play and actually fly it.