Got a Bertella(Italian plans) designed SU27 Flanker which has a 9' long fuse. The plans call for horizontal stab and elevator. The full size has all moving stab-actually they're ailevators. I'd prefer scale control surfaces, but wonder as a matter of aerodynamics what actual differences in control there would be at model speeds. I don't know how proven these plans are, but seems balance would have to be nearly perfect to move a 9' fuse around with a 3" elevator. Thoughts, comments? Bill S.