Of course what I think means nothing, but I personally think you should just have one key that we call the community key, used for everything (73, 83+ series, 84+ series, etc.).

There are still a lot of unknowns about the certificate, and already I'm starting to doubt a couple things about this particular hack, but it's probably safe.

Just as an FYI to anyone who messes with it...be careful. You're dealing with an area of everyone's memory that is not recoverable and is vitally important to doing some things.