You’d know when you need to change over because you can see how much … some cinemas had bells on the, on the projectors that would start vibrating a couple of minutes before the end. We never had anything luxurious like that, you just used to look at the film in the spool box and decide you were near the end so you or the other projectionist would go round, strike up the arc on the other side, stand there, look out of the porthole. When the first cue dot goes through you start up, on the second cue dot … in between this you open the dowser, last thing, you open the dowser as late as possible, ‘cause you don’t want the heat playing on the film unnecessary, you open the dowser, second dot, pull the shutter and change the sound over at the same time with the other hand … simple as that. And then whip round quick and close everything down on the other side if you’re on your own. Again, very easy, can be carried out by one man very easily, but the legal ruling was there should be two men in a box, you know, so most of the time there was.