You are not using the mechanical brakes, right? is there a possibility that you put them on? I know a nice and cheap esc in case you can use a mechanical brake.
I've run 8S so far with the CC HV110 and pistal adapter. There is a slight glitch with the throttle as the throttle seems to get stuck slightly forward. Other than that, the HV has been working well with mechanical brakes. No smoke yet and I'm hoping to keep it that way.