Been flying a Dragon Lady ARC for over five years with a Saito 91 FS and a single standard servo on ailerons and two on split elevators. Flies fine in wind or calm. Nice three point landings when you want them. Only problem has been leaky fuel filler valves causing erratic engine runs. Changed over to fuel dots and smooth engine runs ever since. By the way, all my servos are Airtronics.