... of an inch to avoid the switch looking too "chunky". It is essential to be as accurate as possible with the planing length as a few thou can make a lot of difference to the switch angle. 100_090834_570000000.gif 2. Put a set (that's a bend to you and me) in the rail at the planing length so that the end of the rail is aligned where the running face was (the picture should make this clearer). This location of this set is important since this affects the switch angle. 100_090835_180000000.gif 3. Plane the front of the rails at angle to suit the wheel-flanges. This planing should be to the full flange-depth and rail-thickness at the end, tapering to nothing at the planing length. It is this bevelled edge which guides the wheels away from the stock rail. Again, the picture paints better than my words. 100_090836_380000000.gif 4. Top planing comprises two parts. Firstly three-eigths of an inch at the end tapering to nothing at 82% of the planing length. Secondly ...