Letter Tray Stacking Supports Explained

Finally, in response to a flood of questions, now we've created an actual video to show how to install these incredibly useful stacking supports on desk trays and letter trays. The video pretty much explains it all, and it's only about 3 minutes long, so have a quick look. You can see it at http://www.youtube.com/watch?v=-YUt2afNx_M