]|[
] |[
] | __________________
] | |
] | |------| | |
] | |------| | |
] | | | |
] | | |------| |
] | | |------| |
] |__________________|____
] |
]_____________________|
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The "Pd" is the extra part that was in the square door car, while the "Pd" is not in the Series III. Also the vertical parts of the "Pd" were up against the adjacent walls.
Jay