Took her up today. Wow what a dissapointment. I must not have it tuned right as she really underperformed. Somehting not right. Anyone good engine tuners ou there than give me some good points on how to tweak this motor? I thought I had her all dialed in but she keeps sputtering in the mid range. She transitions fine to wide open throttle and she seems fine when in WOT but in the low to mid range she sputters or skips a beat. Not sure. I started with needle H 1.1/4 turns out and H on 1 1/4 turns out and ran it up WOT and tried to adjust based on RPM is this the correct procedure? What do I need to do?

On a positive note. Engine did not die on me mid flight using same old battery.