... 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 an inch at the end tapering to nothing over a distance of about seven inches. I presume these are inches of the prototype! ...