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Author Message   Neuberger Tinkerer Username: Neuberger Post Number: 50 Registered: 01-2010 Rating: N/A Votes: 0 Posted on Tuesday, June 21, 2011 - 12:29 pm:    The green screw is not a screw in the literal sense of the word, it is just a riveted part that can be moved half a turn so that you can loosen the wavy nut which keeps the shutter front plate in place. Before you proceed, study this first: http://www.daniel.mitchell.name/cameras/index.php?page=seikosha. This shutter is not exactly the one of the V2, but it gives you an idea of what there is underneath that front plate. After removing the brass screws and the front ring you have access to the shutter, if you like. Don't forget the tinkerer's first rule, do not fix it if isn't broken; putting the front plate back is not easy! Both your assumptions about aligning the RF are correct, infinity, vertical first.