my Crown Graphic 23 with Supermatic shutter assy. When using a remote cable release, and on B, the shutter release lever is obstructed by the barrel that screws into the shutter. It will open the shutter, but when I try to depress it to close, the release cable barrel won't allow the shutter lever to trip. I hope this message is clearer to you than it looks to me . Is there an extension to move the cable further out from the shutter? Any input is appreciated. Thanks, Gerry I forgot to add, that all other speeds work OK with the cable.