I was going to scratch-build this, but I decided that trying to scribe 1.6mm lines was going to do my head in, so I finally took a dive into some CAD. I have a scan of original construction drawings dated 1891, though the prototype dates from 1885. I am using LibreOffice Draw to create vector graphics, which allows me to specify measurements to 0.1mm. The plan is to get the sides and ends laser-cut from 1mm birch plywood, use kappler scale lumber for various components and to figure out a way of