Changes

You can build many combinations of multiple platforms stations up to the maximum size of 6x6 (without Signal box or 8x8 with Signal boxtower). There is only one rule you should always follow: To prevent blocking of the station by trains waiting for their load you should have always one more platform than the total number of trains servicing that station with "Full Load" command in their route list. If you can't or don't want to to add an extra platform, make sure at least one of these trains does not have "Full Load" command even if that means it might run half-full sometimes. Otherwise all platforms will get blocked by partially loaded trains eventually, without a free platform for the train bringing the raw materials for the production.