Techfortrade technical director Matthew Rogge has developed Retr3d, a program that will automatically turn useful e-waste into functional 3D printing technology. Users simply need to enter in the type of e-waste that they have access to and the program will design a custom machine specifically for available components. Additionally, both Plater and Slic3r have been fully integrated into Retr3d and will arrange and slice STL files automatically. You can read more at http://3dprint.com/91519/retr3d-e-waste-3d-printers/