Here the view of the Mune and Cross Section of the blade. It is basically a transformed hira-zukuri.
The sides of the blade converge to the "kissaki" in a very smooth way like the tip of a ship. There is no shinogi nor is there any type of yokote. It is very difficult to describe, but suffice to say that each imaginary horizontal line converge to the blade while the width becomes thinner at about a parallel line to the front sharp edge that corresponds to the kissaki. Notice that the sharp edges are signalled in the diagram. I hope Eric will be able to understand it.

This is the alternative crushed-textured surface for the saya which will contrast very well with the silver ring and the "kojiri" in the saya's end. I might favor this texture. I think it has to be a steel foil patinated in a darker grade of gray, similar to the Mune.

This is how the Saya should actually work in a general way. I have not followed the blade shape because of the outer shape of the saya which is similar to the one below. But the principle is here so that the rendering can go smoothly in total understanding. The inside is lined with oiled LAMBSKIN.

This traditional small Dha's sccabard is covered in a very thin silver foil that is possibly 0.5 mm thick. But the idea of placing it here is also to view the end butt. Instead of rounded ivory or oosic, I tend to prefer a flat cut shape with smoothed edges. Click to view enlarged image,

Another view. The color is better so we can see the the top of the guard facing the camera is darker. The Mune should, therefore, be of a darker color, say about 50 percent darker.