Please ignore my comments about the MR train, because these details are not worth implementing!
It's better to prioritize adding other trains, and the S-trains would be very cool! You could start with the 2nd and 4th generation, as the 3rd were only built in a limited number.
Adding some B and Bn+Bns coaches would really improve the gameplay for the 1970-2000 period. Later the B+ABs would fill a gap as well, along with the ME, EA and the brand new EB.
I look forward to see how you will implement the push-pull trains, because you have added many nice features already!
