There is a SS flying at the field with an OS 1.08, it has good vertical, the OS does a very good job. He is using stock Futaba 50 oz. servos, I was surprised. I have a SS in the box, bought it on the clearout sale, should have bought 2, they are no longer available. I will be using a OS 1.60 and 133oz servos on 6 volt, guided by the Futaba 9CAP.