Thank you for the comprehensive review Brad.
As you said, these are probably the best 504's in this scale.
Though there will probably be more versions - hopefully some war time aircraft - the kit parts suggest there will be no earlier models than the K and L.
I was hoping for the A, B, C, D, or E with the early type of cowling and some with the larger fin of the RNAS types.
Still, KP should be commended for their new versions of this classic aircraft.