Hello all! I just received an old Contaflex I through the post ($17 on Fleabay). Camera is in very nice shape externally. Internally the mirror is covered with all kinds of black junk. Not sure if it is desilvering or what. You can see it through the front of the lens. The shutter speeds seem long on the slow speeds. The viewfinder view is nice, in spite of the mirror, I guess if the mirror was ok, it would be really clear. My question is, is there anything non surgical I can do to tune up this camera, such as excercising the shutter, dropping some alcohol into the actions, etc? I am way to scared to open this camera up, but will listen to suggestions in that area. Thanks!