RE: Difference between Goldberg Falcon 56 and Falcon III?
The Original Falcon 56 had the wing and tail surfaces rubber banded on and the front of the fuselage was narrower because this plane was meant to fly with a .15 in it. (I have one that was my fathers). I had the Falcon 56 mark II for my first plane. The wing was rubber banded on and the tail glued. It was a wonderful flyer. The plane was a great trainer/intermediate flyer. (I built it with half the recommended wing dihedral) The falcon III is similar except the fuselage where the wing is mounted is taller to wrap better around the wing, which is bolted on.
Jeff