I don't know a lot about the technical workings of the 3DS and 3DS homebrew but I have some understanding of how it works. I get that the OTP is a console-unique key that is generated on startup, and I know why you have to downgrade to a pre-3.0 version to obtain it. My question is why is it needed to install A9LH? It isn't a useful encryption key in itself, right? From what I read it just is used by the console to obtain other keys, but nobody knows how it does this. So what is the OTP useful for in the A9LH process?