Loaded the mod and like the impact such a small thing can have.
I know it's in the planned stuff for the original mod - if it happens, but you're mod is up and running while that one is waiting. Perhaps the ability to boost the sound a bit. Sometimes I'm in the mood for a bit more Diesel-punkesque environment and more squeal would help that, yet when in normal "human" mode the current sounds are perfect.
I do like the idea of sparks as well, but that's probably a bunch more work, what with having to create the graphics and align the 'particles' or whatever the system calls it, for all the possible rotations, and elevations, the trains can have.
First mod = Great mod -> Great job & Thanks.