I have acquired a Rolleicord V TLR in superb condition. The only problem I have with it is its very, very dark viewscreen. I have two questions: 1) What are my options for a brighter replacement screen? I've read a lot in the archives about screens for Rolleiflexes but not 'cords. I've also heard something about cutting down a Mamiya RB screen. What are my options? Also, how do I go about replacing my screen, given that the viewfinder of the Rolleicord is fixed? 2) Is it likely that my view could be improved by having the camera CLA'd? I've heard that grime can dim the view, but I doubt I have a dirty mirror because the camera appears genuinely un-used. Is it worth it?