@TechConnectify well done on the video. You had a question about sliding doors, with two opening at the same time. These doors can be fitted with a "winter" setting where the doors wait on each other to open and close. Limiting the draft of cold air. Little cable between the two controllers. Most of the time this isn't done because it limits the amount of people getting through a door. People are impatient, it is a forgotten setting on the controller box above the ceiling.