Thanks for your swift reply Eduran and Optera.

Yes, I suspect I made a mistake somewhere Eduran. I'll take a look at your post and see if I can figure out where I went wrong. It looks pretty extensive so thanks.

I've just loaded the Inventory Sensor mod Optera. It looks to be a nice simple ...

I have a series of LTN stations set up to provide and request fluids. I keep finding that the wrong fluids end up in a train and then it delivers to the wrong station. I expect that for some reason it's not fully emptying a wagon of fluid and the mix up happens when the train is sent on the next ...