OK I noticed that in flight, especially at higher head speeds, my HBK2 would kinda twitch every now and then, I set the heli down and slowly moved the cyclic and noticed that my front servo would kinda of stutter and twitch at near center stick if I just barely moved the stick the servo would shake, I replaced the servo and it still does it. I am using the stock transmitter and servos. Any ideas as to what could be causing it? I have some of my own thoughts but I would like to have them confirmed by more experienced pilots before i go and do anything serious.