My .72 is great. I've run 7, 10 ounce tanks of Performance Plus 15% with 20% oil and it idles just fine. I have it in my Right Flyer 40 (just for break-in) but I would like to get it flying with the .72. I've never flown an overpowered trainer... Also got a 40 size stick that barely torque-rolls with my magnum paperweight .46...