I guess if you are looking for the absolute maximum fidelity points, you should build it as originally designed.
On the other hand, if you are looking for maximum flying points, you could shift the wing a little.
As a teenager back in the sixties, we fudged these designs a lot. Too bad I didn't bother to ever record the changes. None of us knew there would someday be a Classic stunt event.
For me, it's an easy call: I want/need the flying points.
Ron