As a newly registered user of this forum from Germany, I want at first express my gratitude for your very valuable howtos and tips about jailbreaking all my Kindles (from 2011 starting with a K4NT gray, over a PW3 to a recent KT3 Basic).

I've all the time over used all of these devices in offline mode only, i.e. have never been "really" using an Amazon account. I prefer reading free/public domain classics and/or PDFs (especially scans from Google Books and other sources) on these devices. Most of them are in EPUB format (I even have some very old Palm PRC files from about 1998...

) - that's why JB is so essential for me... My favorite reader is, BTW, CoolReader (the CrazyCoder build on NT4, and the Vlasovsoft touchscreen-optimized port on PW3 and KT3), but I also use KOReader from time to time. Great tools making a great piece of hardware even greater!
I've a suggestion concerning the first posting here:
a) You should set links to the very last firmware version
5.8.7.0.1 that allows downgrading for all touch kindles instead of 5.8.7.
b) Additionally you should recommend that "standard offline users" like me should update to 5.8.7.0.1 after jailbreaking and
avoid any further updating by leaving the device in airplane mode. This will keep the chances high to re-jailbreak such a device later on. In other words: Updating to 5.8.8 and later is not recommended in that case, though an already applied jb would survive these updates.
Best regards, and keep on hacking

Antinoos