I agree with both sides here. Hitech did have a problem with this servo series, however it has been fixed. If you got some of those older servos (maybe they sat on the shelf for a while) then its possible. HOWEVER, these digis are power hungry. If you are using small gauged wire and 4.8 battery pack then your asking for a problem. When I run digis I use a 7.2 battery regulated down to six and nothing less than an 18 guage wire.

If it is the servo thats acting up send it in to Hitech they will make it right. It beats the heck out of paying all that money for JR servos.