im building the top flight dc-3 and its time for the engine selection. i was told to go with the wankel over the saito 56 because they make such a nice fit. im worried about the size of the 3 blade prop i can swing(if it will look scale), and the sound. thats alot of waisted money if im not satisfied. any help would be nice. does anyone know were i can find a sound file for the os wankel?