Naw, a 4 stroke is too heavy in my opinion. I put an OS .32SX with an APC 10/5 on mine and unlimited vertical is the name of the game. Will hover better than I can fly it too. It will also putt putt along at walking speed and scream into rolls like its mounted on a Makita or something.
The OS .32SX is the perfect engine for this plane and allows you to balance it without adding any lead and using mini servos for the ailerons, elevator and rudder (HS225). Used a Futaba 148 for the throttle.