HS-81 throttle servo
At 32 oz.in. the HS-81 has plenty of torque to move your throttle, and saves a full ounce of weight vs. the standard servos. You could even go for the HS-60 Super Micro at 16 oz.in., but that would only save 0.16 oz of weight over the HS-81. You talked me into it, HS-81 will be my next throttle servo!