OK, I think I'm getting it now. Thanks for the pics.
Just so I'm crystal clear, in the configuration you're suggesting
@elainemary (ie, floor, BB, board, BB, supers, crown board) there actually aren't any supers between the two BBs, just your board. So the bees in the lower BB put their stores in the BB, I imagine? Or I guess I could put a super on the lower BB and then put the board above that (one lift further up)?
I'd love to see a pic of the board itself. Does it have a solid floor to create the separation or a mesh floor?
Maybe I'm over-complicating it, but since I haven't tried the Demaree yet (this is season 1) and since I have WBCs I'd like to work out how I might do it next year if the need arises.