mph,
Saudia md-11's 285990kg mtow with fsc in auto, fsc in manual mtow reduced to 283134kg. of course there is tail fuel if fuel load exceeds 66 tons.
in fsc taxi mode fuel can be auto transferred but aft transfer is inhibited and stays inhibited until fsc transitions to climb mode.
the ones that said you can get 5000 lb increase in h mode must be ones with extended aux tanks we did not have.
that's how ours worked, not trying to bs anyone.