Here is the track design for my layout. I named it Alexander's line in rememberance of my son. The tracks run straighter then on the design. The layout is 12' x 11' with a double main line, 84 feet of track for each main line, the curves are 21" rad. and 19" rad. The plans only show the track plans. I am going to put a mountain across the top section to hide the curve tracks under a tunnels. The track level changes 1/8" for ever 16" of run. I still have to figure out a way to hide the bottom curves so that it does not look like 3 loops when finished.