I agree that just re-soldering will probably last a very long time. After all, most of the s100's out there never fail in this way. Too many do -- especially when one of them is mine. I think that on those that failed the original soldering was not quite hot enough,or the mating surfaces were not close enough or not enough flux flowed. I would be tempted when reheating to add a tiny tiny bit of additional solder -- if it looked like the original was skimpy. Also, now that we know the weak link we will take care not to press the shutter too hard.
