I have had to mark the brackets as they do not follow from one dish to another. When you locate a satellite, by the trial and success method, Mark the dish or mount next to where the chart says you should have been setting it to (that is the correct location. ALSO--- very important for most mounts --- mark the pivot point(s) on the mount. Maybe circle the bolt/nut with a marker or spray paint. A very little slop here will cause any other markings to be WAY off. Your repeatability will be better, but probably not perfect.