Thanks for the request! I have talked to the author, and should be able to add support as soon as he finishes writing the remote interface code in his mod (so that I can add new electric trains with my mod).
I have support for Angel's Perrochem and Smelting trains (not in dependency list anymore). What mod is the crawler train in? I don't see it in the core package.
Latest patchnotes from Realistic Electric Trains say this: - Improved the remote interface (unfortunately, not backwards compatible). Is this the patch you were waiting for?
Okay, that's great to hear, my current playthrough isnt even close to using the electric trains (mostly due to the pyanodon package) so I am sure the updates will come before I am able to use them.
We got it to work! Latest versions of RET and MUTC should play together nicely. Only bug is that when you change modules in the Modular Locomotive and it triggers an MU replacement, you won't see the new statistics popup because it doesn't know which player to show it for a script-created entity.