Hi ! I've got this nice Isolette III with it's light tight bellows ! (yes, light tight !!!) The shutter was sticky so I dump it into lighter fluid, and let it dry. Now, it runs (even the self timer works) but is slow. The second equals two and the 1/300 is near 1/100. Do you fellas have a maintenance manual for this shutter ? Preferably on electronic format to reduce costs. Thanks a lot in advance for my pockettable medium format camera !