The container station uses a script to build the stack(s) of containers and general goods from 3 files that contain the mesh files of the objects. These files are:
20ft Container,<kuid:-3:10014>
40ft Container,<kuid:-3:10041>
General Goods,<kuid:-3:10013>
If you want to change or add to that list, you'd have to edit them.
Bob
