I`m using the pulpmill from fitz505 and I`ve got the 5 tracks in place but I don`t know what 2 of them are for. I`ve got the one for dropping off the woodchips, picking up the general goods ,and dropping off the diesel fuel but I don`t know what the other 2 are for? They`re just beside the fuel dropoff and they go under a rack of pipes for loading either tank cars or covered hoppers. Can anyone tell me what product and railcar these are for?