Yes, I have been running one for about nine months now. It started out in a powerline edge540 - wing loading was a little high @ 7.5 lbs and never seemed to run quite right with the falkon ignition. I was running a pro zinger 14-4 around 9600 rpm with a bisson muffler. The ignition boot never fit really well wich resulted in some rfi and skipping @ certain rpms. Last month I sent it C+H and had them replace the ignition - what a difference. It now turns a 15-4 apc @ 9700 and runs smooth as glass with excellent transition and very little mid range burble. I have it in a f90 that weighs in @ 9.5 lbs. Plane will hover, but not much left for pull out. I was looking for more of a small gas sport flyer and I am very pleased so far although I only have about 5-6 flight on it. I would guess I have about 2 gallons thru it and seems to be getting stronger all the time.