Originally Posted by exocetdj
that guide should work ok in normal circumstances. you could try and install the stock recovery and then flash the ota using the guide. failing that, the best way would be to reflash a custom recovery then rom and start from fresh
Well, it didn't work.
The phone sat on the boot screen for about 3 minutes, then rebooted back to the launcher; Settings still showed 4.4.2. Then about a minute later; restart.
Ok, I've made backups of as much as I can (SMS, apps, photos)... I will re-load TWRP, do a full wipe, then install a custom ROM. I wish I didn't have to go through all this hassle.