When I bought my blade 400, the pitch servo was twitching ALL the time. I called HH, they told me the servo was bad and sent me a new one. I installed it and the twitching was gone.
Now I installed a Castle Creations Bec and I have twitching all over the place. If I go back to the internal Bec from the esc, all is well.

Please help me, do you think the CC BEC is causing interference, or could it be bad?
any suggestions?
Thanks