Reply to "When was the coal refilled?"

I think I will fill it after the trip, when on its way to the roundhouse area.

But in the "real world", there would have been no way to refill the locomotives tender UNTILL it got to the "roundhouse area", as that would be were the huge coal dock was located.

This will be easy to demonstrate, i.e., start with a tender full of coal, and at the end of the trip the depleted coal can be restored to full level.

Thanks!

Alex