I have just received a Graflarger back with Aristo light source from Ebay for the sum of £0.99 ($2). I was expecting it not to work and intended to convert it to LED however, it does work so I may keep it as it is for now although I may replace the transformer for one with a 230v primary. I have measured the AC output of the transformer and when powered up it starts at 580, rises to 650 then drops and stabilises at 630. I have some valve amplifier HT transformers which would give me around 500 - 600 volts so I will probably try one of those. Can anyone tell me if it will produce light connected directly to 230 volts or does it need a higher voltage to start? It does not have the negative carrier which isn't a great problem as I have use of a CNC router so I can easily make another one (and options for smaller formats). If anyone has one of these, I would appreciate it if you could tell me the distance the negative sits from the diffuser and the overall thickness of the holder. I measure the slot at 5.5mm (7/32"). Thanks. Steve.