I am a ceramicist and have thought about it. The problem is shrinkage with most clay bodies. If you buy a special clay body from laguna clay co or another clay supplier they can make minimal shrinkage clay bodies that work well. Also if you use certain clay bodies they will fully vitrify and then the clay wont absorb any liquids. Porcelain does this, but it also shrinks about 5-8% (also dependent on what porcelain clay body you are using). Your best bet would be to make mold and cast the pieces with a minimal shrinkage clay. That way all your pieces are pretty close to the right size. I still think machining would be easier. When I am done with my designs I will post them so anyone can have them and take them to a machinist. Is there anyone who know's the dimensions for a 510 connection? I might get really lucky here, does anyone have a 3d autocad drawing of the connector? If not, I might just use a 510 from a old atomizer for my genesis connection.