I am doing research on the p51 Mustang for a possible painting (which is how I came across your page). I like your ring designs too, especially the Art Nouveau Blue Diamond design.
I am curious however: Why use paper with such a heavy tooth? The texture is really nice.
Wow, I was looking through your gallery, and your ring sketches are beautiful! I was really impressed. All your other sketches are excellent as well. I like the Spitfire sketches a lot. Nice work!