The trouble with 3D printing is that it uses a 'layering' process. And the resulting plastic & composite parts are not strong. Doesn't work on aluminum and magnesium, I'm told. Now and of course, the military and NASA have access to other machines that use a different method to make parts. Now if the regular machines print old molds, that's great, but you still have to find someone to cast aluminum and magnesium from the molds. I just don't know yet if this is the wave of the future or just smoke.....or if it's going to happen in my lifetime.
Kevin
Kevin