I have about a dozen or more Agfa Karats and others where the shutter blades do not close completely after the shutter has been fired. These are Compur, Compur-Rapid, Synchro shutters and you have to cock the shutter by moving the cocking lever, and once the shutter fired, the lever goes back to its initial position and the shutter blades are all closed, light tight. My problem is that the cocking lever hangs up on the return trip to its initial position, stopping short, and consequently the shutter blades do not close completely, sometimes only a pinhole, but still not closed. If you push the lever back to its initial position, then the shutter blades close.
So, is there a remedy, short of taking the shutter completely apart?