Cheers dude lm near half way with the underside.... Issue 50 has a great underside layout of the replica(page 10,11) but it can differ from the studio ESB falcon on close up inspections but it's a great ref I'm still waiting for more actual photos around the front end under to make more details/marks & blast points etc....as Mr Dymszo says there's no absolute but lm planing on as near as possible...
This may help bro... http://s898.photobucket.com/user/dtssyst/slideshow/Falcon Reference Photos 1