Can't say I really envy you the outbound flights in US Y, but they can be survived and your return on NZ is something to look forward to. And BD to GLA, of course. You've done a great job of minimising the cash outlay, too.
Have a great trip!
Thanks! I was actually 92 miles short of this total (thank you Pune!) so I knew I would have to slum some of it in order to come back in biz. However I'm fine on daytime flights, I can read. It's overnight flights that kill me, so a lie-flat bed in the nose of a 747 should do the trick ...