It installs quite easily. Keep in mind that the extrusions can be mounted either as the directions show, or upside down, whichever works best for your saw. The only critical part is to make sure that the joint between these two extrusions is smooth and even. File the surface of the larger one to blend it in with the smaller one, even the slot where the green strips go. Don't put the green strips on until the display will easily slide across the joint in the extrusions, and when you do install them, make sure that they face the right way. The bracket that mounts on the fence can be bent in almost any conceivable direction. All that is necessary is that the end that magneticly attaches to the display is parallel with the surface of the magnet in the end of the display.
I have had mine for almost a year and don't know how I managed to use the saw without it. The angle gauge is great too.
Charley