C.G. is way behind the recommended. At first I added nose weight to get the plane to balance in the recommend range. I than removed the weight and the plane was still stable and flew a little better. If you are using a 46 size engine and a standard muffler do not even bother with adding nose weight to get it to balance in the recommended range. The plane will fly fine. I then started to add tail weight. The Plane is a blast to fly. Others have trouble flying mine due to it being very tail heavy. I am use to it now.