balancing is needed because,
as the first station is unloaded more times , only the first station has resources accumulated .. and the trains come in for loading , wait for the first station to clear (because , i have added a condition to disable station if there are not enough resources)..
i observed that first station has more resources while other is empty
if that has been balanced , the waiting trains can access that ...
i hope that makes sense .. what are your thoughts ..