[Factorio] Automatic Train Coupling: breaking down a train, now better and more automatic
Trains now cycle through their steps automatically. Any number of shunters can be used, 2 would probably be sufficient for this length of train. Length of train can be adjusted by increasing size of rebuild line (the second-to-highest horizontal rail). At the moment the parallel loading of cargo is irrelevant because shunters cannot couple fast enough, which might be solved by increasing shunter size.