Nice work! Having an underquilt already probably really helped getting the shape right.
I just made a light camping quilt myself, and it was really nice to be able to pick the materials that I knew I would like. I'm a sweaty sleeper, so i don't like the feeling of a lot of technical nylon fabrics right on my skin. They often feel really plasticy and don't let much water vapor through. I made my quilt with a meshy fabric on the inside, and a traditional lightweight, water resistant, windproof fabric on the outside. That way I could still keep drafts at bay, but without my skin ending up clammy.
I would like to eventually make a hammock with the under quilt built in for weight savings.
