flyingkiwi,
This is only my opinion !
I would'nt waste my time on HTBJ, get your hands on the CX interveiw book!! I know from talking to the Interveiwers that many people get bogged down on technicalities, it is so easy to confuse yourself with tech's ie:Q why does the 744 have fuel tanks in the HS A. NOTHING to do with aerodynamics, purely to make it go further ( burn off is another topic ). I had a friend who went into the HTBJ answer and totally confused himself and everybody in the room.
Point: keep the answer simple, and if you dont know the answer ( and there will be some you dont!), tell them you dont know, Dont Bull!!!!!!!
Good Luck,
HUSTLER