After receiving an Agfa Clack off of the 'Bay' with alledgedly good working shutter, that appears to not be the case with the 'Bulb' setting. The shutter still works like it is set to 'M' Is there something that I can check to fix this? I do know that a single screw can be removed to take off the meniscus lens and aperture assembly, but I do not know if just looking at ths shutter would show me what the problem is??? Anyone have any ideas as I'd like to start using this camera on a tripod with 'Bulb' for long exposures.