Why not just look at a smaller plane? A Tower Trainer .40 kit is $45.00. That engine would probably pull that airplane around pretty well. You could also put it on an LT25. I watched a guy fly one with a .40 on it yesterday and it seemed to fly fine. My LT40 is almost done and it is a big plane. I'm putting a .46 on it. Not that I'm an expert but I think I'll be glad for the extra ponies in this plane.