I hate to be negative but the g 38 will be very marginal on power it will fly it but you will have to keep power on all the time i have a fpe 2.4 40cc in mine and it flies it but you must keep power on it nice flying plane you will love it i would use at least 90 oz servo for rudder and Hitec 645s or similar for elevators and ailerons which are around 110 or so ozs of torque dont take chances with a plane of this size . I would use at least a 1800 nicad pack or first choice i use is the metal Hydrate packs 1650 mah flies it all day long on one charge good luck