I have just negotiated the takeover of a room in our basement for an o guage layout and am need in help of layout design. It is likely that I will upgrade to Atlas track from O-27. I am interested in incorporating the following: Reverse loop sidings multiple train operation any other cool ideas The room measures 13'8" by 15'10". I have been told that the size does not lend itself to building a second layer. This is probably ok. If someone can help with design of a layout, it would be much appreciated.