Indeed, that's what I thought, but I was told, as "fact", that at least two railcars were built there, and no amount of doubt from me could shake the strength of this statement..
I suggested that there could, perhaps, have been some of their stuff on BnM tracks, but the railcar statement was upheld strongly.
Anyway, the factory is flattened and gone now, even though it hadn't had any railway use for some decades.