See if this helps too:
If we assume the eFx X-Wing is scaled correctly, then here are some numbers to use in your calculations for scale.
The length from those to the rear of the main fuselage (not the engines) is 20.75"
The width of R2 from shoulder to shoulder is 1.15"
The width of Luke's shoulders at the very top is 0.758"
The width of Luke's helmet at the ears is 0.420"
Not sure how I didn't see this earlier, but thank you very much... I can plug those in and see where scaling is sitting everywhere. To clarify what was the measuring point at the other end of your main fuselage end at 20.75"? It wasn't clear to me above. Thanks again for this