So I got this excellent looking early rim-set Compur with a clean 4,5/13,5 Tessar. It was working nicely on all speeds except the 1sec. where the clockwork stopped in the middle of the second. I tried to lubricate the gear axles with tiny amout of oil, but it didn't help, so I decided to clean the shutter in naptha. Since the aperture blades are made of some type of paper, I had to take the shutter mechanism out of the housing. I cleaned the mechanisms, but now I can't reassemble the shutter correctly it seems... Nothing works. There are a lot of small pieces and springs, and I can't find the problem... How irritating is that? I never should have started tinkering with it. :rolleyes: Now, is it worth it to send the shutter to a repairman? Can it be as much work as a compleat CLA to just reassemble the shutter correctly?