I also have the hangar 9 sukhoi with the 3W 106 up front,I moved the rudder servos up just behind the CG and both my reciever battery and my Isolator battery directly in back of that,with the 106 up front the plane balanced perfectly with no added weight,If you do decide to go with the BME most likely you will have to add weight to the nose! taking in the fact that the CG is sooooo far forward there isn't much room to put any thing else up there. I always put my fuel tank on the CG since it is usually the heaviest single item (when full) that you put in your airframe it takes a whole lot of room to keep it there, so shifting weight ahead of the CG in this particular airframe really isn't an option.