The C.G. is always measured at MAC, 27% MAC may be 4 inches at the root but it's still 27%. Don't confuse C.G.% with balance point at the wing root, they are not the same thing. Think about it this way, 25% MAC of an F-86 Saber would be behind the trailing edge of the wing at the root because of the wing sweep, but it's still 25%, I know it's a little confusing be trust Dick, MOST of the time he knows what he's talking about {you know I'm kidding..........right Dick?}