On another note, got more done:
Though I don't have a picture, the modifications to the tank care are almost completely done.
The engines now have more detail, including but not limited to smoke:

ID 12878, screenname Redoctober2009, helped me make the connections between cars, among other details, more accurate.

I have also included an emergency brake valve on the first two engines:

The result of activating one is that the engine's (and later, car's,) emergency brakes kick on, only to burn out three seconds later, creating heavy sparks and intense heat at the wheels:
