With a 3D printer I would print my custom designed flash drive housing. This housing would hold a micro flash drive and be the same size as a regular flash drive. In the center of the housing there are 5 planetary gears that all rotate when the outer dark colored wheel is spun by hand. I have always wanted to do this project but never had the 3D printer to accomplish it. With the MakerBot® Replicator® 2 Desktop 3D Printer my dream could become a reality. I uploaded the SketchUp files so you can look at it in 3D or print it for yourself.