I'm not familiar with the model but a web search reveals there was more than one version/size of it out there. I found a .40 AND a .60 size so it is possible there was a .25 size. So, I would suggest you measure it. The wing span should be 63 inches and the fuselage 52.5. If so then you have a .40 size model. It's ready to fly weight should be in the 5.25 range. If it is smaller than this then you might have a version intended for the .25. Bigger and it's the 60 size. Good luck!