have someone help you. pick up the plane by the spinner and the tail (this is where your buddy comes in) if one wing drops, take note and repeat. if the same wing falls when you pick the plane up again, add a little weight at the opposite wing tip. repeat until the plane balances. Most planes should be pretty close on the lateral balance. so it shouldn't take much. If you can, try to shift batt/rx towards the light side before you add weight. hope this helps.