That's definitely an idea worth trying, though it was mentioned elsewhere on this post that you can 3D print and polish your masters for casting rather than rel

That's definitely an idea worth trying, though it was mentioned elsewhere on this post that you can 3D print and polish your masters for casting rather than relying on having the lens already. https://news.ycombinator.com/item?id=32588947 https://news.ycombinator.com/item?id=32588947