OK, its eazy peazy, get this engine mount and four 6x32 blind nuts and four 6x32 socket head screws. Don't use the wood screws that come with the mount. The .56 will fly your plane with ease in fact a Saito .40 will fly it.

http://www3.towerhobbies.com/cgi-bin...&I=LXJ772&P=ML

I'll be back. This is my .56 in an RCM 40, I get a little fancy with the throttle. You can just run a wire out past the carb and bend it 180 back to the carb and it will work just fine.