Originally posted by imataquito
linger what did u do to make the sanwa go aster ???
curious .......
well...... never tot someone could make a servo go faster 
I did this to my Sanwa WR digital servo:
I removed the red (positive) wire from the servo. I soldered on the red wire directly to the positive on the battery. I also soldered on a choke (inductor that came with my KO servo) in line. Without the choke, the servo movement causes glitching. The Sanwa is now about as fast at the KO2123. I've been running this for a couple of months. Since the Sanwa is coreless, it should last for a while compared to std kit type servos. Good luck