All good advice and info.
Just so as we're all sure:
"747" usually refers to the classic Jumbos - in CXspeak that's the "older" Freighters with no SOs.
"744" is of course the -400 & -400F's, "mainline [pax]" and "freighter" respectively.
SO's are mainline.
geh065 - now I assume that you mean the 'upgrade' is SO to JFO and not a preposterous "...Airbus ... upgrading to the 777"
Or did I fergit to listen to a 777 pilot today??