Just finished sketching this out. Figured I'd share it. The space is about 4.5' wide x 2' deep. I don't remember the size of the lower section, but the proportions are close. I think I might be overestimating the angles on the turnouts, but that should only affect the length of the yard. (The yellow and cyan dots are turnouts, the red dots are X pieces) The orange box at the bottom is an engine shop, the ones at the top are a city scene. The pink track towards the top is elevated. Any ideas what to do with the empty space at the bottom?