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