In my B44 I have the Speedcontroller (Nosram ISTC) 45 grams and Servo (KO2343 I think) 62 grams with 20 grams of lead between the speed controller and servo on one side and the motor 190 grams approx and mini Spektrum receiver 6.5grams on the other.
So as you can see my weight balance isn't actually that good at all at 127grams compared to 196grams, didn't realise it was that far out
However I have never noticed any ill handling effects from it, although I may try adding some weight to the servo nd speed controller side to see if there is any noticable improvement.