Sometimes I get a bit frustrated with this game. I'm moving things over to a train network and I'm currently having an issue with not producing maintenance because I'm short on rubber, but then I go to my rubber factory and the output station is full of rubber. So I check the network's trains and there's 4 of them that could take the load but are sitting there with a status of "waiting for job". I guess the thing to do for important stuff is to just set up a line with a train that goes back and fort of "wait until full" and "wait until empty"?