Trying to get things going.
When running German railroads, one can add a Swiss or Austrian train to the mix, after all all three countries use the same electric system. Norway and Sweden do too. Denmark does not. After all, why would they use the system all teir neighbors have. It would just make too much sense. While Germany and Austria are fully compatible, the Swiss zigzag of the catenary is smaller than in the former. This is why Swiss locos have narrower pantos, which can be a real pain when you have installed catenary for your German loco, and then buy a Swiss loco, and the panto jumps out from under the catenary. Used my BLS Ae 4/4 for all catenary installation. Speaking of BLS and SBB, one can happily mix passenger cars from both railroads in one train. Seemed to be the way it was done. Just make sure they are in blocks. BLS locos withe pure SBB consists are possible, as are some German or Italian cars in the mix.