I have another enlarger, a Meopta, which I use for wall projections. This means that I can risk to get involved in the project. Paul, thank you very much, I would appreciate that diagram. How much do you think a shipment of your spare transformer would cost, and how much would you charge for it? What is the problem with using another 250w 24v power supply? How could I plug a timer to any power supply other than the ones from durst? Thank you all for your answers, I still have to think if I'm up for the risk.