Spotted one of these medium format cameras on sale second hand for under £300. Anyone familiar with it? Browsed the web for background and two potential problems wre mentioned;- The rangefinder is difficult to use, as the double image you make a single image is very faint? The "cow bars" are needed as the lens assembly is very fragile and many used models are damaged because of this? Fair criticisms, or should I take a punt on this one?