I recently purchased a Kiev 30 and got into 16mm photography. The sets go for reasonable sorts of prices on eBay - I've had a lot of fun with it so far, picture quality is far better than I expected. But one of the accessories that came with it...I cant for the life of me figure out what it does. See the attached picture from ebay: The black reel sort of thing in the bottom left of the picture. I started out under the assumption that it was a development reel, but I cant figure out how it would work. Maybe a tool for loading the film into the cartridges? Measuring tool? Time Machine? I suppose I can get by fine without it, but the curiosity is driving me slightly mad. I look to you, APUG, to help me sleep easier at night.