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My name is Johan Olsson and I am a swedish teacher of science and design. I bought a Makerbot Replicator 2 for educational purposes and it is now integrated in my education. We make gears, Rubics cubes, rockets RC cars and much more. I have little formal education in CAD, but a very deep interest in the development of 3D-printers and their applications. My students share this interest and we learn together.