RE: HK Small Bolt Hydro same as HOTR
What havent you changed that could be the culprit?
Whats remained the same on every run?
Have you been running the same Rx? Maybe not the same but same brand? I know you switched ESC's and motors. So that cant be it.
I would try another radio system all together and go from there.The power for the servo is being routed through it- so it could be the possible culprit.