So in the last week I have been pushing ahead with the maps and have now reached milepeg 65, Kokonga station. Right now I am drawing a station layout for that yard which had a few sidings including a ballast pit and a coal loading stage. Part of the interesting aspect of this is that I found photos of the old railway station building, which is offsite. It turns out the Kokonga and Ida Valley station buildings were taken off the site and shifted into the Ida range in South Canterbury (the border between Canterbury and Otago is actually quite close to Wedderburn) and I am adding these locations to the map.
Part of Kokonga (still being drawn).