Nevermind that link. Apparently it doesn't work anymore. You can message "BronzeLusitanian" who is the creator, for an invite. Here's his roll20 link: "⊕BronzeLusitanian⊕ | Roll20:. https://app.roll20.net/users/404437/bronzelusitanian
Now that I'm interested, it looks like a real pain to gain access to it.