I have one with a Fuji 32, a couple of small firewall mods was all that was necessary. Balance required shifting the battery pack aft. Plane flies great. In retrospect this is too much power, although it sure will go vertical, but then the real one did not. If you decide to do a go around on a landing approach and bring up the throttle too fast there is a tendency to snap right. A Zenoah 23 would be just about right.
Mike