Like Tony said about them being around for a while, it has ... I've seen the 3D modelling stuff which uses a wet resin and the laser hardens it. The product comes out clear. This, however is really cool. As the man in video said, with the right resin and hardener, you would be able to create something from a digital file which would be able to handle strength situations. I'm thinking space applications here where you need a tool you don't have. Instead of waiting for the next shuttle mission, you just send up the digital file to the space station and print out what you need. It could be a part or a tool, doesn't matter. Johnny-on-the-spot that sucker and you are done. NOICE! Very good find Gaba and thanks for sharing!