[DNSB]

For what it's worth, I installed WinterBreak on my daughter-in-law's old PW4 (fw: 5.17.0.3) since she purchased a Kobo Libra Colour. The older granddaughter loves seeing her books in colour). After getting the KLC setup and happy, she donated the PW4 to me. After installing the jailbreak, hotfix, KUAL/MRPI and KOReader, it seems to be working fairly happily.

She did look at the Kindle Colorsoft and a couple of other colour ereaders but since the Colorsoft is currently not even listed by Amazon Canada and Amazon US shows it as out of stock when checking from Canada, picking up the KLC at a local Chapters bookstore was the faster and easier option since Chapters had the same sale price as Kobo's online store.

Edit: Since the first PW4 handled the jailbreak well, I decided to jailbreak my PW4 since I had the first one to use if mine bricked.

My use for the PW4 is for testing ebooks when I am working on formatting ebooks for a few people so not a critical item for me and feeling in an experimental mode, I jailbroke it while it was on firmware 5.17.1. This went okay so I then downloaded and manually installed the 5.17.1.0.3 update. After that update went happily, I then reinstalled the hot fix and KUAL. A few restarts later, my PW4 was happily on 5.17.1.0.3 and KUAL launching KOReader & RenameOTABinaries seems happy enough.