I can't allow this day to end without expressing my deep gratitude to all involved in this project.
Spent several days going through all posts here and elsewhere on relevant forums, carefully making notes and taking screenshots etc, but was still sure something would go wrong when it came time for the procedure itself.
It took a retry or two on certain parts, but on first attempt today, I've successfully j'broken my PW3 using the LanguageBreak method.
GB/EN hotfix worked like a dream, and KUAL, renameOTAbin and ... most thrillingly of all... KOreader are now all in residence on my P'white.



I won't go into the collateral benefits for me of this, specifically having KOreader on my Kindle, but suffice it to say, it breathes new life into this eight-year-old little front-lit reader.
In awe right now of, and so immensely thankful to, everyone who made this happen.
Donations will follow.