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3D printing technology will grow factorially. In the same sense that computer power and speed has grown exponentially over the past 40 years, 3D printing takes on a whole new speed of development. These machines are capable of reproducing themselves with improvement at each step. The growth will not be exponential, but follow the curve of a factorial. If the technology can be developed to use the printheads at high temperatures, there is nothing these machines cannot do. We will see the results very quickly.