Compliments are what keep me going with this thread - if people were not interested, I would simply keep progress to myself
Speaking of progress, I have made some slight progress. I have found (and bought) a pretty old Volt meter. Though not Victorian, I like the look of it and the age means that I will easily be able to replace the 'clock' face with something more interesting.
Furthermore, I have taken apart one of the two flash units. Together with some advice and a good look at the innards, I am quite confident I will be able to do the rewiring as needed
Making actual progress will have to wait. As fun as it is to take apart electronics, I will need a good housing for it. Though I would be able to put it in a wooden 'box', I hope to find something suitable made from metal.