The size and torque of the servos is depended on the driver circuitry in the receiver. As the receiver is only 7 grams I would speculate that the provided servos (plus two for a count of six) would represent 80% of the expected load. Make that five as a throttle controller does not draw what a servo does. Then this IS something that the radio forum would be better to expound on.

My point is SS is far safer than the AM/FM the AMA stuck the modeling community with. Why there wasn't serious resources spent years ago by the AMA on SS shows their interests lie else where.