Can anyone tell me the performance/quality differences (other than small size differences and those I noted below) between the Turnigy S3317B, Turnigy TR1160A, and the Turnigy S3101S servos. The S3317B has ball-bearings and cost less than the S3101S. The TR1160A cost $2.00 less than the other two servos and has 0.02 kg more torque. I know I must be missing something because it appears as the cost goes up the servo features/performance goes down.
I want to use two of these servos as sailarm servos in a small sail boat (Graupner Micro Magic). It was easy to open the housing of the servos for attaching 1 KOhm resistors at the potentiometer to get a wider travel range of about 170° full stroke. The servos look robust and seem to have a solid gear. If they do their task in in the sail boot well will show the future. They are not the fastest ones, but I wanted to have leight weight with high torque at low power consuption. Seems it was a good choice.