777 Trim Setting
Hi 169 West,
I guess there must be some clue in the B777 FCOM, however, I would rather directly call or e-mail the guys at Boeing, they will probably provide good advice.
There is not any shame asking to the relevant person, rather than trying to re-invent aviation.
Be careful, stay on the safe side of the borderline anyway.
Good luck ! Have a safe and happy flight on your ferry, and further on.
JL