Well crap, now I have another delima. I was thinking about getting the Futaba S3115 servo. Problem is, it's a plastic gear servo with 37oz/in of torque. But, I found a set of hitech servos that are faster, run on 6v, and provide 47oz/in of torque. Problem is, I can't seem to find servo arms long enough for them, and hardly any reviews to say how the centering is. UGH, I hate this...