well, it took it off the perfect cg point i had before with the 150. i need to mover the battery back now. the enigne added about an ounce and a half over the saito, but the prop seemed to add a good deal of weight also, and that is weight at the very end. so it was to niose heavy for how i like it. i could harrier it like that, but i can't give you a real flight report until i fly it on the right cg. i had it hovering a foot off the ground, that wasn't any different, ecept now i need a bit more right thrust. i would say it doesnt change anything really. it's on the upper weight limits for this plane, but works very well if you want an animal. my problem is i am not used to the thottle response of a 2 stroke, so it's going to take a few flights before i "feel" the plane. pretty fun though.