Edsal Shelving accessories

I've been using the Edsal Rivet Lock shelving for several years. When assembled correctly, and with their limitations kept in mind, they're strong and sturdy shelving units.

There are a few problems that I've found: The particle board shelves are so thin the tops sit below the shelf rails, leaving a rim around the entire shelf. If you have loose parts you don't want rolling off, this works fine. I prefer to slide things on and off a shelf rather than lifting them over an edge, so I raised