4.8v or 6v is not an issue as both servos are rated to handle both. I believe the issue here may be "holding power". I understand the digital theory of cycle rate, power drain, etc (sort of). The thing I don't understand is: WHY, if the two kinds of servos (1) cost the same, (2) have the same torque & speed specs, (3) are the same size, (4) are both coreless; do they even have the regular servos if the digitals have better holding power. I have no idea how their centering compares. What is the reason for getting the standards instead of the digis in this situation. Why does Hitec even make the 925 anymore.