... if you were designing a fictional branch terminus to practice the basic Templot functions. But your track plan is mostly straights, so should be reasonably straightforward. The key starting point seems to be the clearly marked toe position for the turnout across the diamond. By temporarily setting geometry> turnout road exit length to long, you can adjust the turnout size and crossing angle to match, and roam it along to match the toe position. The toe marks are shown on the templates (not the rail joints). Like this: 2_120557_100000000.png That's in P4. The crossing angle for best match seems to be 1:7.1/4, which would be a very unlikely size for other companies but is listed as a standard size by the GWR. As you can see, that is with a 12ft old-type switch, generic crossing, and converted to CLM angle. With that established, the next task is easy, tools> make ladder crossover> make regular ladder, and you have your diamond-crossing. You could maybe leave doing that until ...