Thanks for the input. I think I'm gonna risk it - she'd have to be very unlucky for things to go wrong, and even if she misses her connection and has to buy a new one with no refund on the old fare, she will probably still not have spent any more. My experience with DJ is that they tend to be reasonably flexible with these sort of issues too.

Good point re the fog Kiwi Flyer. And fingers crossed that my perfect record of flights in and out of WLG remains intact - the worst delay I've ever had is about 40 minutes, and that was mechanical.