Hello; I know you might want a two stroke opinion, but my experience is with flur strokes. My 4 star 60 has an OS 90 in it, the old one with the pushrods up the back. Flies great, big prop, The other one in our area had an OS 91 Surpass in it. He could hover and hang on the prop with that set up. I suppose a 2 stroke could pull the plane around too.