Today,
I flew my A-10 with an OS 50SX (weighs less that the YS.45), and it was awesome. The front engine mounted A-10 handles just like the full size, turns on a dime, rolls fast, and pitch is very sensitive. I highly recommend to anyone building this kit, to put the engine on the nose. The light wing loading and the accessibility of a front mount engine is worth the sacrifice of the engine head being visible. All up weight 6 lbs compared to 8 lbs with ballest and engine on the tail.