Hey there,
Thanks for the update. However, I am bringing sad news.
For start, I launched factorio with only Config Train Specifications from train mods. Did a few tests, mainly waiting in menus for game to reload with new startup options.
1. there are 2 locomotive speed % settings, one on the top is ok, the second one is actually Hit Point %. Nothing major.
2. for the rest I can only say that something is not quite right. For the part I managed to understand:
2A: The capacity of wagons isn't 1:1, eg. with 40% capacity of cargo, I had 24 cargo tiles out of base 40. Bumbing percentage up to 100 made it 60 cargo tiles out of 40. The numbers do not add up.
2B: The liquor wagon is even more strange, the weight % is for 100% not right. As the locomotive struggles to move even an inch with 3 wagons.
Same thing with their capacity. with 100% percentage, they should carry 25k of liquid, in my save single wagon can hold ~650k of liquor. Bumping down the % to 25 their capacity is down to ~160k.
That's all for now, I didn't have much time to play around today, I will try to bring more feedback in the coming days.