I have the CMP 50 Corsair and I love it. The CG on the planes are off a bit and I can't remember exactly what it should be without measuring it again. Only thing I remember is that if you use the plans CG, it will be tail heavy. I had a OS 46 on mine and that is only marginal on a grass field so I went with an old OS 61 I had laying around and what a difference that made. I can now get plenty of ground speed before takeoff without any problem of the plane snapping. You will see in my pictures I completely repainted it and put the machine guns where they are suppose to be.