CBRSTAR, your reply concerns the the position of the derailleur in respect to the plane parallel to the rear wheel. My issue concerns the position of the derailleur in respect to the plane parallel to the rear axle wheel. In other words, looking at the derailleur from the side of the bike (as opposed to the diagram in your reply which looks at the derailleur from the back of the bike). The position you address would be affected by a bent derailleur, the position I am concerned allows the whole derailleur to be rotated until the mounting bolt is tightened down.