I suggest you could add the S8 train journey which is operated by national belgian operator SNCB, this journey goes from Brussels-Midi all the way to Ottignies and Louvain-la-Neuve. It calls at: Brussel-Midi, Brussel-Centraal, Brussel-Noord, Brussel-Schuman, Brussel-Luxemburg, Etterbeek, Boosvorde/Boitsfort, Watermael/Watermaal, Groenendaal, Hoeilaart, La Hulpe/Ter Hulpen, Genval, Rixensart, Ottignies and Louvain-la-Neuve. It would be really nice to see it because I actually commute weekly on this train. It is operated by Desiro City trains which are usually coupled by 3 units to support for large passenger capacity. If you think this is too complicated, could you add one line of the Brussels Metro instead. For example Line 1? Have some good time and stay safe!
