I'd like to know how the tank is holding up. How he/she attached the slate to the glass or if he used another layer of glass for the bottom instead over the slate. How the tar was removed from the metal and how to get it off the glass. And lastly, what is the center brace originally made of. Mine is missing, there are two tabs with a hole in them, I have no idea what should be there, how to attach and what to use.