These are DXF and CDR (Corel Draw) files for the laser-cut acrylic chassis I used in my line-following robot, Usain Volt 2.0, for the 2015 Las Vegas robotics club line following competition.
I didn't take any pictures of the pieces before (or during) assembly, so unfortunately all of the visuals I have available are of the finished robot.
160214 EDIT: Thingiverse user, Melodious Zero, was able to use these DXF files as a template for a 3D model for another line follower robot. I've updated this page to include his STL file, as well as a few pictures from his 3D print. The STL should have the following specifications:
Height: 4 mm
Length: 182.21 mm
Width: 108.5 mm