Running mine with a Saito 91...no big mods, squeezed (emphasis on squeezed) a Great Planes 12oz tank in somehow, glued the servo tray and firewall a bit extra...first flight this weekend if the 20-30 mph winds ever let up..will let you know how it goes....I also added some extra color striping to the underside of the wing as I didn't think the all white would show up well in the air...Bill