I am not privy to any plans for the carbarn addition, but I do have a couple of thoughts regarding Paul's question about a wall between the bump out and the rest of the structure. By leaving that space open, there would be opportunities to position some larger artifacts (Vose inspection car, handcar, etc.) or a diorama that could be viewed from all sides. It would also be possible to use two-sided display boards or display cases in that space. In addition, if there was a need for a space for a historic presentation, for instance, it would be available to place chairs, a lectern, a screen, etc. Finally, an open space would permit short-term displays of a collection of photographs, ephemera or artwork. I hasten to add that, other than "Rangeley," I don't know which rolling stock will be displayed in the main space, and there would be a need to allow circulation of visitors throughout the structure.