I built hostetlers airplane and the only issue I could see is the nose rotating forward hitting the engine exhaust. Also,the fact the gear in the 1:1 scale is garbage,wow in a heavy model even worse. Also consider engine type and flying field conditions. I fly grass and the G-62 with G-38 rear moves it along nicely. 2 cent notice that i went cheap building this airplane,meaning engines I had in stock. The least I would do for grass is 46cc. Anything smaller pavement only.