We have a 3D printer in our lab and it is used to custom fabricate small attachment pieces we use in conjunction with our neural network chips. It cost about $18,000 US dollars and was made by Hitachi in Osaka. I have often considered making a custom duel throttle shell for my CH Pro Throttle, but have not had time to fool with it. The printer works well but it is slow, and like Billzilla said, for our 200mx200mx200m design space, a model can take up to ten hours to produce.
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If you can defeat me in a fair same altitude duel, you are either Hartmann's ghost or you have a ganja problem that needs treatment.
Like asking weird questions and are good at math? Maybe you can join us at the Jacobs School of Engineering, UC San Diego. Tackling the grand mysteries of the age with science.
At the core of most of life's deep mysteries, is the language that Mother Nature truly speaks in, ..... mathematics.