This was very helpful when we changed out our control unit for a faulty button. However - a word of warning - our unit was different from shown in the video (and they might even mention it in the vid). Our control unit had a plastic tab/ tang on each side AND two on the top of the unit. Result - pulled the unit out, the fascia popped off with the force and one of the flex cables was damaged. We'd paid £34 for a new fascia and button off the forum - which is a great deal. Fortunately, we were recommended to a auto-electronic garage in town and he dispatched the unit to an expert in PCB fixes. Three days later and for £54 the unit returned fully functional. A bit of a hassle but a lot cheaper than buying a new one.