It might also be of interest that the airliners' 757 fly with a CG of Mac around 26 or 27. Both AA and Delta fly domestic around these numbers.
The CG is with one decimal like 26.8
The CI is around 56 -60.
Then there is a section of the impact is the CI was 0 or 300.
I cannot speak of International flights - I have none for the 57.

Raymond    Boeing or nothing
KFLL   South Florida