I love this mod so much. Thank you for this. It's really fun to try to leverage the mini trains' strengths, and I love their balance points. Their fluid wagons are pretty good and valid for when you have multi-fluid deliveries, whereas the cargo wagons are a little harder to justify, but I'm finding that 2-car trains perform tasks that full size trains can't, and that's just perfect.
I'd love to see it more broadly compatible with modded fuels and such, but I don't know if that's usually done by the overhaul mod makers or by the mod itself. In either case, this mod is a gem.