The onion v3 address used above still has issues that are a part of the joinmastodon guide (link) but I'm working on that. One of the unfortunate issues is that you will frequently be sent to https instead of http as the protocol, manually changing it back will get you back on track.
If you haven't already please sign up! I made this instance for the users of raddle and others so anyone is more than welcome to sign up. Please be aware that I may reach out to you by email for more info on who you are/what your intent is.