... of the outer rail is called the "switch radius" in Templot. This is applicable only to curved and semi-curved switches. (For straight switches Templot displays a derived "switch radius" as a guide for rolling-stock design, but it is not measurable anywhere on the physical switch.) To create your custom curved switch start from real> switch settings... menu item. Select a custom slot in the list to contain it, and then click the set custom switch... button: 2_080445_230000000.png (The dimensions showing are for a UK curved switch of the GWR.) Enter your known dimensions. The "offset at heel" is called "Heel Gage" on your drawing (7 "). The bottom 3 dimensions relate to the physical lengths of the rails, and hence the positions marked as rail joints and the adjacent timber spacings. They don't affect the rail geometry. The "tangent length" between a crossover shown on your drawing depends on the track spacing (tools> adjacent track centres.. ...