Gotta agree with Dan:

(a) the 955 is single conversion, 945 is dual

(b) in general the approach should be to start unplugging stuff until you make a difference. When you do see a difference though, don't just assume that the last thing you unplugged was necessarily the culprit - i.e if you unplug your ECU followed by 4 servos before you see an improvement, then don't just assume the last servo to be unplugged was it - plug the other components back in again to confirm whether the problem lies with the last item unplugged, or is a more insiduous compound problem.

Gordon