The numbers are fine. Are you flying 3d with this plane? I am. The reason i ask is because your gonna use a 10x4 prop. I was gonna use a 11" or even a 12"x4. Also i dont plan on using the stock muffler. I think it will look bad with this huge thing hanging there. Im gonna guess the pits style one i ordered will be less weight too.

So with your number we our 3oz heavier? Thats fine, mount the batt in the tail somewhere and cg is gonna be easy to set.