Four stroke is wat better for a plane like the somethin' extra. I would go with the saito .72. (if your building a kit you can eaisly make it fit. if not i think the saito will fit in the nose on an ARF but it may be tight.) even if you are unsure about hovering, put a saito .72 in the nose, and you can have the power should you ever be curious. Also, with a 3D airplane, it is very easy to get into a tight place where you will need the power, believe me!! a if you definitly planning on hovering then go with nothing but a four-stroke!! the torque is un matchable. and you don't have to wait for the power band to kick in as you do with a 2 stroke. the power is always there. even at 1/8 throttle as oppose to 1/2 with a 2 stroke. True, 2 strokes are cheaper, but you get what you pay for! However this is just my opinion and is only to be taken for what it is worth. I hope this helps you out a lot!!

Brian

Edwardsville, Illinois USA