To get desirable static and dynamic stability, the tail volume would need to increase a bit. It is generally "cheaper" (weight and drag) to get that tail volume with a little more fuselage length than by adding area to the horiz and vertical tail surfaces, so that's what most designs do.We keep talking about wing span all by itself, but isn't there a ratio of length to wing span that doesn't work? When I look at aircraft that are really short, like 15 feet, they don't look right with wings much longer than 18-20 feet. Is it just me? We get into flying wing territory at some point.