A rotating body will want to align with the centre of mass of the object. The mass at the extremities makes the forces higher and the position (High up the tail) will push the tail down and the nose up. The best set up is with as much mass as possible near the centre of gravity to avoid undesirable inertia and centrifugal effects.
That's about 4 years ago. OME. A lot of people want "Perfect" Planes. It's nice to have a safe nice to control plane. Pilot love them.. Desk top models are decorations. that Airline managing types (the wrong ones) invariably have on a shelf in the background painted in company colours. . A "Stretched " version of anything is usually much inferior to the original in handling. The first is designed by an aeronautical engineer The later ones by order of an accountant..Nev