Andy,

thanks. That's exactly what I was hoping for. So, evidently there is other circuitry (e.g., a capacitor) beside the potentiometer which affects the rate of change to the signal being fed to the servo. I guess there is some analogy with the way dual rate proportional channels function - instead of the rate of change being applied to displacement, it is applied to transit time.

I was finding it difficult to understand why slowing the servo down would reduce its torque.

Good stuff about the MC35's. I'm sure they'll blow the HS-55's away.

David.