... . For "A" blades make the template a 9ft straight switch and 1:24 crossing angle. The planing length is 22mm. If you are careful these filing aids should be good for several blades. But cost next to nothing if you need to replace them. More about planing lengths and the stock gauge here: http://templot.com/companion/real_track.php Here is some prototype information. It is next to impossible to copy this exactly in 4mm/ft scale, the above methods produce an adequate representation: 2_041213_250000000.jpg regards, Martin. posted: 9 Dec 2015 13:29 from: madscientist Thanks guys Martin, all very clear The reason that I am looking at this in detail again, is I am trying to setup my little CNC proton milling machine to do all these for me, Im looking at what fixturing I need, for both the switch blades and the crossing vees. With 30 turnouts to make in the new year its worth a bit of investigation Have anyone ever tried milling them ?, nickel sliver at this dimension ...