Smart Outlet shelves - 4 way

I liked Chris' original design, but I wanted it for a 4-way outlet, so I extended each of the pieces to accommodate it. However, after I printed one, I realized that the part would be a) stronger and b) use less plastic, if I merged the pieces before printing. However, I also included the separate pieces, if you'd prefer that way. All the parts should be printed on their side including the outlet face so you don't need to add supports.