If you have a QUICK system it is very easy to install; it is impossible to mistake the color of the threads and the qty of thread supplied is more than enough. The paper template is functional and useful.
After 15 years of wind and weather, the rubber parts had dissolved and I needed a replacement. Luckily, these switches are still available. The exchange was no problem. If the switches hold again for 15 years, then you can probably be satisfied.