Robert,
Thanks for sharing, and all I can say is that is incredible. How do you get all of the intermediate hammer strikes smoothed out in the final stage, is it the wheel? I really like the pattern making with just simple craft paper and magnets, that is a great idea. It looks like a good amount of artistic ability is needed for that kind of fabrication.
I lived in the Maryland blue crab area for a while in my life, but never used the same shell cracking tools as you all. Boy I miss crabs season.
Paul