Yesterday, for the first time since I don't know when, the blasters worked all the way to the end. The photo was therefore really rather good.
I don't know whether this was a fluke or not, but I'm really really hoping it's something permanent.
Having said that, some of the faces are almost impossible to see, particularly in the screaming room, and more of the lighting needs sorting, but I'll take what I can get, thanks!
Unfortunately I was so blown away by the timing not being completely out, that my score was completely embarrassing.