Hi gang! I have a question about storing cameras with leaf shutters. I have a number of folders from the 1950s, Voightlanders, Daiichi, Agfa, etc. How should I set the shutter speed when the camera is not going to be used for a while? Should I set the dial(s) at a certain speed, or does it not make a difference? I fire them at all shutter speeds, occasionally, to keep them loose. Thanks!