I received a lot of input on starting smaller and simpler. I really wanted multiple round-trip loops and large radius for my passenger train that could be combined into one and they all came out BIG. At first I was worried about having a lift up section and I didn't want a duck-under. The great pictures and instructions on this site about swing-up sections changed my mind. With a little work and changing to a lift (swing) up section I came up with the following. It is only 6'6" top to bottom. A lot smaller than the previous 10'>11' versions and should be a lot easier to build. What is everybody's opinion of this? The "X" for the inner loop is a double slipswitch. The center of the layout is mostly flat. Might have a very slight grade for the "yard". The passenger terminal (brown box - top center) is up about 4". The loops on the upper left are stacked about 5" up and are in a storage/workshop room. The layout will be on casters to pull out for access to the back side. Lots of room on the bottom & right side. The green box is the size of the Comet Roller Coaster. Wanted to make sure I had room if I decided to add this in the future. I think it looks cool but waiting for some feedback from someone who has one. The gray area is a portion of the auto roads and parking lots. Turntable got lost in the picture scaling but it is the center of the six-track fan. I haven't decided on the tunnel/mountain/bridge arrangement for the upper left hand corner of the visible part. There is about 4.4>5" separation between the track from the station and the two inner loops. Most likely I will have the loops go into tunnels but have some trestle on the high track between them. Outer folded loops 29" minimum radius. Inner loops 23". Most inner curves spiral about 1" in or out per 18 degrees of turn for smoother operation.