I have a 20+ yr. old T.F. 182 that has been flown with Futaba S3004 servos on all control surfaces, using a 4.8v RX battery without issues. I am currently restoring that plane and upgrading to 2.4 radio and a 6.0v RX battery and will be staying with the S3004 servos. The S3004 servo is rated @44.4 in oz torque with a 4.8v battery, and 56.9 in oz with a 6.0v battery. For scale flying the S3004 will work fine. If you want more torque for aerobatics, the S3010 servo will give you 90.3 in oz with a 6.0 battery. BTY, both S3004 and S3010 are BB servos.