I'm currently on a quest to obtain every single Joustus board variant there are, including the ones only present in the demo (along with some side things related to Joustus probably). Once I'm done, I will upload everything to the Wiki. This will take a while. Hope no one minds.
(Note that I'll only be collecting the boards themselves/their layouts, not the elements that are on them, like gems and how/where they're placed, or the region specific elements. I'll also be editing the pictures a bit so they look more "clean", so to say, so they won't look exactly like what you can see in-game.)