LGB Passenger Car Question

[Railroad Pony]

I have a LGB 3082 vestibule combine. I want to put the vestibule end parts on a 3080 coach. How in the world do you get the 'celing' of the vestibule ends off? It seems like it's glued on. I got the roof off and see that there's screws behind the bottom of the diaphragm. It looks like the diaphragm has heat swaged pins on the back. That had to be done after the car was assembled. Getting that off seems interesting. Has anyone disassembled one of these?

 

[Sirfoldalot]

Wish you luck! Would like to be able to help, but don't have one to look at?

 

[Railroad Pony]

I've got some other parts donor vestibule cars coming. I hope the glue has let go on some of them.

 

[Iron Horseman]

Hmmm, interesting the only LGB passenger cars I have are the 1870s style shorties. So I am no help there.