Double-sided ? (before I redo my project)

Next bring the two halves together..merge the two halves and weld the central points along the floor joint.
Center the model and remove the internal faces from the floor joint.
The floor is how you wanted it…level with the bottom of the door access.
All you would need to do now is to fit the ends, roof and windows…and merge together if you wish
Last make the animated doors.
You will need to check with an MSTS user to see if the method is ok.

Bazza

I am impressed you made this exemple !

This post is quite hepful to me with all your advices and hints.

Thanks again.

I am going to figure out what method to use.