Originally Posted by
A1pax
Thanks, sscywong and LHR/MEL/Europe FF, for your replies - much appreciated.
Some good news. I have managed to add on the second flight (TPE to HKG) to the first booking (award). So, now both flights are on one booking, both with CX and both in J - no change to miles required, but had to pay the change fee of $175 (first ticket $150 and second ticket $25). This means I do not have to worry about bags, so that we will have more time to do lounge hops

You never had to worry about bags, and having everything on one ticket won't get you any more lounge time.
upgrade for 2 for $175... possibly not too bad. But it's a very short flight.