Elon Musk, the Silicon Valley entrepreneur who became the inspiration behind Tony Stark for director Jon Favreau in the Iron Man movies, says he has figured out how to design rocket parts with hand movements through the air.

Mr. Musk says he will post videos next week of designing a rocket part with hand, and then immediately printing it on titanium.

Two things. Mr. Musk needs a high frame rate holograph generator; if you have one that is gathering dust, maybe call him. And no, he is not building an IM suit.