You've missed this crucial bit from earlier
Ah, so I have. And yes, that is pretty decisive in nailing down the timeline. Agreed on all points.
Except perhaps for the caveat that the Franklin might have been an older vessel, built to be useful to the MACO, when she received Henry Archer engines for the warp 4 record flight. I mean, it's not as if the MACO ought to have much use for superfast testbeds as such. Heck, the Franklin might even have been surplus donated to the MACO after outrunning her usefulness in commercial prospecting duty or something.
Timo Saloniemi