The third way.
It suggests an option where a filler does not need to be adjusted manually. Actually, what does it mean? The desire to glue the room with the same panels. If you use such a tool as an electrician, then you can use it to make a beautiful even angle with it. At the same time, you can set absolutely any direction, such a cut will not provide a saw. For a stretch ceiling, your ceiling plinth is available and it should not be confused with other varieties, always pay attention to this by making a purchase.