ORIGINAL: Steve
Dude, your servos are not bad. You have a bad Y harness or not enough power. I've solved several peoples so called problems by using heavy duty extentions and 6 volt battery. All of the digitals will do this exact thing when there is not enough power to them and you run a Y harness or dual servos.
took the words out of my mouth.. i use no extentions and Ys due to one crashing a plane. I make my own with hitec wire. comes in a 50 ft roll. plus i can make a 100 for the price of 5
LUCKILY i have never run accross a servo that went bad sitting around.. I have had 1 bad out of the box (JITTERS)