That’s a tough one. That airplane typically builds nose heavy with a .40 2 stroke. I’ve got a Super Tigre S40 on mine and had to put 6oz of weight in the tail to balance. This is after making a hatch behind the wing for the receiver battery. With a 4 stroke you would need to extend the landing gear to which is a weak point. On a hard landing, the gear flexes back and the wheels hit right on the wing spar.