Steve, I agree, I can't believe the number of shots that I haven't remove the lens cap, set either the aperture, or speed, didn't change the ISO/EI on my handheld meter, or worse the whole roll on the wrong camera ISO. One recently is a new folder that can be double exposed, well you know the rest. If I were you I would shorten that red ribbon and make a tie for your hand so you can't reach the shutter release unless you pull the slide. How is the Pentax 6x7 going. I really like mine, but it is a lot to haul around. I didn't take it to Ireland last month, just too much extra work.