... 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 another three-eigths of an inch at the end tapering to nothing over a distance of about seven inches. 100_090835_410000000.gif 5. Radius the sharp edges along the running edge of the rail. Drill holes for fishplates and stretcher bars as required. 100_090836_060000000.gif 6. Remove all sharp edges and polish out any surface scratches. posted: 9 Dec 2015 14:09 from: madscientist David R flipping fantastic, just wow, those diagrams should be all over the interwebby ps op planing comprises two parts. Firstly three-eigths of an inch at the end tapering to nothing at 82% of the planing length. Secondly another three-eigths of ...