You do realise that 8.1.0-0J can only use Gateway, right? That comment could be confusing for OP. It's also silly to recommend using only the guide to update to 9.2 as it requires a Japanese Cubic Ninja, which is very expensive. And the job could be done just as well using Gateway, which it is likely OP already has. Also, if you tell OP to skip Part 2, then they will not see they have to backup their saves, and no sysNAND backup is made (actually read it, and you'll see that when you're on 9.2, it gets you to put EmuNAND9 on your card and make a sysNAND backup, and reminds you to backup your saves).