Does anyone know if the train air line runs along the side or down the center sill of the 41000 quad hoppers. My two photos are of the other side, it is not shown in Chuck Yungkurth drawing or is it shown in the modleing article in the Lehigh Vally modeling group. I have a photo of the rebuilt twin hoppers and it is run alone the side. Would like to get this car off the work bench and painted. Thanks in advance Don Ford Kanab UT