I realize there are reasons why things don't need an explanation to just work smoothly on-screen, but it's 3 in the morning, and my meta is bothering me.
So two things: How did the Cabal find each other? Because "set up a secret chat site with an obscure name and all write threatening letters to the same person" really does not help me come up with an explanation for how anything.
Also, how did they get their Wall Piece? I mean, as far as any of us could tell, the Mr. A-face-in-an-Echo that they followed (never mind wondering how they knew that following Mr. A's face would lead them to a Wall Piece...) was the one from the Echo in which they stole the Wall Piece. It is at this point that my brain explodes.

