Layers. If you have RRO, MSB, RSN, HRR, or the BR 182 or BR 155, you will have more services available using stock from those DLC with the max being four hundred something. RRO gives you the MRCE BR 185 for container freight runs. MSB/RSN give you the BR 146 and/or 143 with Dostos for Regional (RB) and Regional Express (RE) services and the DB BR 185 and/or 143 for mixed freight (With MSB you also can do oil trains). HRR gives you the BR 422 to use for additional RB services.
