Airfoil Elevator

[pedwards2932]

Just making sure I am giving accurate info.  Fellow was building a Guillow Lancer with a flat elevator.  The plans call for an airfoil elevator.  I believe that adds live to the rear of the plane and changes how you balance the plane.  With a flat elevator he is much more likely to need nose weight?  The Arrow I built has the balance point way to the rear of the wing (see pic) and it seems to fly nice and stable. Is what I was telling him correct?