I have a 12'x12' room with an 8'x4' (seperated by a sheet rock and stud wall) area in an adjoining room for a loop section and staging. The room has no features that will interfere with these dimentions, even the door opens out. Without becoming too heavy in the nomenclature, here is what I would like to see in this challenge: Era: late 1940's P2P ops Double main from origin to terminus 2 yards Origin yard should have a turntable with 4 stall roundhouse. Terminus yard should have a 3 bay car shop. Both yards need ashpits, coal and water. swing bridge over the Mississippi river (which by the prototype is roughly 30 miles before the terminus) terminus yard should lead into the hidden staging area Industries to include grain elevator, livestock, iron ore transfer (via canal barges), light manufacturing, petroleum, lumber and passenger service (which the prototype supported left hand passenger ops). There is also a 60 degree double/double crossing with a small interchange yard in the middle. I would like to avoid lift outs, but do not mind duck under entry/exit. It can be multi leveled as long as the helix is 1 turn with a light grade, and it does not block a duck under entry/exit point. The largest locomotives that need to run reliably are f units. As the prototype is based on the CNW line between Proviso yard in Chicago, IL to Clinton, IA there is no tremendous concern over grade. I don't know that I will use the layout design when I get to building, but I might take elements or the whole thing. I know that there is a huge wealth of talent on this board, and I am hoping to tap into it to get me over my creative block.