I just got back from maidening my Goldberg E-Yak 40" span, ready to fly weight of 26 oz without the battery. I am useing the rim fire 35 30 1250 amd it hauls this plane around very well with plenty of power to go vertical pulling out of ahover, using a 10/7 APC e-prop. At end of flight that was about 10 min long motor was warm but not hot as was the 2200 mah battery. Your Extra and my Yak are probaly very close in size and weight.