This is a conceptual placeholder for a series of printed joints that can be used for an enclosure. The general dimensions are designed for a 0.1" Plexiglass enclosure (so you can both protect and admire your creations). There is no stl file for the corner piece due to an OpenScad error ("Object isn't a valid 2-D Manifold") that I have not been able to debug yet (though I know where the problem is with my difference modules >2). If you debug it before I do, please let me know.