RE: Original Falcon 56 vs. Falcon 56 Mk.III
Also, the fin and rudder changed with the MkII and that is carried over into the MkIII. The Mk.II added ply doublers and glued on stab; except for the stronger spars noted above, the wing and stab construction were unchanged, and I'm pretty sure that is true for the Mk.III also. Basically, it got beefed up, and the stab-fin was slicked up, but the aerodynamics didn't change.
Jim