1. In general I think its possible, but that’s asking a lot as the origin changes (e.g. point of sale for taxes currency etc.)This brings me to my last set of questions before I pull the trigger:
1. I understood it's easy to call and add some segments after the booking (i.e. add a CBR-SYD and a SYD-CBR), right? How about more advanced rebooking requirements that I might need to do. For example, my trip is essentially composed of two half trips, but if later I need to move the first half after the second half, doable, assuming availabilities?
2. What happens to points and cash if after half of the trip, I would need to cancel the second half?
3. Did I understood correctly that it's ok to start and book the trip now, and add segments as seats are released by airlines?
2. Once departed, its consumed so points lost I’m fairly sure, taxes refunded at great effort
3. In general yes, although in the past I’ve had issues with airlines that offer seats for new bookings but not existing bookings. I.e. I could book HKG - HEL as a new single flight but not add it to an existing PNR. Not sure if this still happens or which airlines do it. But worth thinking about. Also need to consider married segments when you add a flight, it might show available point to point but not available married with another flight.