I HAVE A FUNTANA 90 WITH A OS160 AND 16-6-10 ZINGER PROP. THIS IS THE IDEAL SETUP FOR UNLIMITED POWER. THEY RECOMEND JR 811 SERVOS BUT I STRIPPED THE GEARS IN THE AIR. I RECOMEND HITEC THERE ARE STRONGER GEARS CALLED KARBONITE AND ARE CHEAPER THAN 811 WITH MORE TORQUE. THE # IS HS-635HB AT 30 DOLLARS EACH.