We are booked in D on QF93 on Sep 07. Until today it has been showing as Skybed fitted. All of a sudden today (actually between this morning and this afternoon LAX time) the seatmap has gone to non-skybed a/c.

Is anyone familiar with the ops procedures and timelines? What is the likelihood that there will be yet another substitution before flight date (we are 1 month out)?

Non-Skybed would suck as I arrive at 7.30am and need to be at work that day.

My other options are to waitlist for Z (but don't fancy my chances). If I did waitlist for Z, and closer to the flight day I saw the a/c substituted back to Skybed could I call and cancel my waitlist (assuming it hasn't gone through already )?