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RailKing F-3 AA Set Operating Manual
O-31 OPERATION
While the RailKing F-3 AA Set diesel is more than capable of operating
on O-31 curves and switches, you may find that certain light cars are prone
to derailing when being pulled or pushed by the RailKing F-3 AA Set
through O-31 switches. Should this occur, we suggest adding weight to the
cars making them heavier and less likely to derail.