Hey Marty,
Thanks for stopping by with that information. I'm curious about the "cardboard" covers. Could you explain more about what they are, constructed from, the process, etc? My old high school metal shop had some basic sand casting equipment. We were able to cast a small aluminum anvil, but it was flat on the back-side(half an anvil

). We did not go further into the process & learn to create a full profile item.