Moving on now the itinerary is developing / evolvong - 2 questions:
1.
I'm considering AA JFK-SFO as part of a DONEx ticket. Some flights seem to have First and (WH)Y only whilst others seem to have First, Business and (WH)Y. I'm following recommended practice in making as many segments "OPEN" as possible, so, given that DONEx books into A if there is no D offered, will this cause a problem for an OPEN ticket (flights will credit to QF FF). I suspect I may need to have a flight number on the ticket so I can lock it into A class - otherwise the nice CX ladies in BKK may insist on writing the ticket into D since some flights offer it.
2.
I look like having an arrival into LGW in the afternoon and a departure from LHR about 23 hrs later (ie next day). Is this still classified as a transfer or will I be slugged as a stopover?