Another great example of the value of this forum. I called QF and asked about whether D class books into A for the AA DFW-LAX flight. We went through the rules and lo and behold, there it was in black and white! Admittedly, a cursory glance wouldn't have found it. So, it was immediately booked into A, and I have used "Check my trip.com" to confirm the booking. Quite exciting as it's my first foray into A....