I couldn't find an angled version of gridfinity that I liked, so I made this! It's angled 25 degrees so you can use it at the back of grids for easier access. You can easily stack them, too, as they have magnet cutouts for that sticky factor. This was designed to be put behind 4u (28mm) gridfinity boxes. You can easily make a custom box or find one to raise it up more as needed. 

Most importantly, it won't interfere with the grids next to it. Behind is flush, so you can easily put more grids behind it.