I used "IntelliCAD 6.2 PE+" 3D CAD program to create a 3D model of a car, exported the model to a DXF file, loaded the file into "Pepakura Designer" program to unfold the 3D model to 2D, copied the unfolded model to the Windows Clipboard, pasted the model into "Robo Master" program, resized the model to fit the cardstock paper, saved the model to GSD file, loaded the file into "Wishblade Advanced" program, made a test cut using pen, and cut out the model. When I fold the model into 3D, some parts don't fit properly. I think that the "Pepakura Designer" program doesn't take the thickness of paper into account when unfolding the 3D model into 2D. I ordered a license key for "Pepakura Designer" program yesterday morning but I didn't get the key. Any suggestions on using 3D CAD and "Pepakura Designer" programs to create 3D paper models?