I agree with that...also, you may bend/break a crank when it fails before the carbon prop. I have owned many a yellow aircrat spitfire, and you can easily move the CG back to 6.5 inches from the leading edge at teh fuse. This will help the nose over tendency greatly. Mine lands i grass all the time and rarely noses over, but you do have to know how to handle the elevator on landing to assist with nose over issues. Yellow is very conservative on the CG. Take it for what it is worth to you, but this is where I have balanced all of my YA spits.
Jeff