I want to renew the leather of my Spotmatic SPII. Of course it is possible to cut the leather in the area of the self-timer lever, but I want to do it not the quick and dirty way. Which tool should I use to remove the lever? Some recommended a lens wrench, but the two wholes are only 6mm apart. Which one would fit? Or is there any other recommendation to open the screw without scratching the surface? Will it be opened clockwise or counterclockwise? Many thanks in advance.