That's a beautiful result. That said, never say never ... just when you think it's done something else comes along.
Look at the "case" side of your 8mm crown. See how smooth it is? A gen crown has thin stainless wrapped over a brass form, and you can see the rough edges on the inner face. I'm sorry I don't have a better picture, but here are two to show what I mean. I bet you could take some jeweler's tools and scribe the inner face of your crown to make it look more like the gen piece. With your skills it shouldn't be hard at all.
Athaya crown
Gen crown