Welcome, bmcnew. I do not know the camera in question, but it is possible that the vertical R/F adjustment will be, like that of a screw Leica, at the advance side window. If there is a trim ring, you could remove it and see if there are notches to help in rotating the glass. If the window is not round, then of course this cannot be the way to do it. Be sure not to do anything that cannot be undone. In general, slight vertical displacement is not a fatal flaw.