New layout plan for 2008, revision 3

revised again. Spiral, flipped over this time (going to break the main deck, oh well) double ended yard, reverse loop at the window only. Cheating like anything to get this to fit - reverse loop bends [i]into[/i] the window and is only 11"; and that yard ladder is [i]under[/i] the helix. 1200-1500mm tracks in the yard.