They actually sculpted the molds by hand, since this was back when 3D printers were crude: https://news.ycombinator.com/item?id=31667798 https://news.ycombinato

They actually sculpted the molds by hand, since this was back when 3D printers were crude: https://news.ycombinator.com/item?id=31667798 https://news.ycombinator.com/item?id=31667798 3D printers only just barely became viable as prototyping tools for molds in the last few years. Specifically the Form 3.