Hey BPS!!! good to see you again! well if anyone is the man to scale one up you are!!!!! I aquired a Fun 51 kit not too long ago it seems there are a few twin Uproars out there but not so many Fun 51 twins, you are the subject matter expert here!!! I am thinking you could borrow heavily from profile tecnology that is allready being used, a carbon fiber rod or rods in the main fuselage seems to be the trend right now. it will beef up the longitudinal strength and distribute the engine load throughout the airframe. Look at Swanys House profile airplanes, he is the go to modern tech guy on profiles and there are tons of build pics to give you an idea of how and where to put the CF rod. I will be watching this thread with anticipation as we are thinking of building giant Uproars.