IFMU, you said; "Hey! It's got lateral symmetry! I bet we can find a buyer for it somewhere around here."
Then you say "I said someone, not me! "
OK you don't buy into symmetry, however an old friend does. He is currently reading the book and while discussing it he mentioned a very interesting conclusion. He said that the 'language' of symmetry mathematically explains that it is impossible for an unsymmetrical form of life to exist in the universe.
His interest in the book is due to the fact that he is a professor of Mathematics.
Maybe the tail-rotor is rotorcraft's 'pie in the sky'.
You can force just about anything to work, but that doesn't mean that it's efficient.
Dave