I have an expolux shutter with meter probe a which is perfect when it works ,there is a lose wire somewhere which can cause problems but as long as I am in the studio it is fine ,though you will need a manual back up just to be on the safe side . On the repair front ,Image to image the sinar dealer in the UK will charge you £150 to send it to Sinar HQ to evaluate the problem ,Though as the equipment has ceased to be made I suspect the chance of them fixing it is nil. My repair man tried to look at it but gave up because Sinar could not supply the parts