If you are having problems with getting the Pen to work successfully, and you also want your brain to be fried, this little lady will help you with all your Printer Pen problems and sexual desires...>>>
Win 8.1 64-bit. DX11. Advent Tower. Intel i7-3770 3.9 GHz 8-core. 8 GB System RAM. AMD Radeon HD 7700 1GB RAM. DVD ROM. 2 Terra Byte SATA Hard Drive. Philips 17" LCD Monitor. Saitek Cyborg X Fly-5 Joystick. ...and a Briggs and Stratton Petrol Lawn Mower.
What if in the future everyone could have such a pen and make whatever they want? I'd print a rocket so that there won't be a need to spend an enormous amount of money on one journey. I know that lots of organization are trying to use 3D to build different part of rockets (I know at least two companies which are doing this - Relativity Space and Skyrora). Skyrora is producing an engine for spacecraft https://www.skyrora.com/skyrora-xl. There is a lot of stuff to be done before every part of the rocket can be built with 3D printing.