Have a look at what propping the roof open would be like.
from first glace looks like loads of intricate parts, so delicate job.
have a look at the diagram, from the birds view it would appear there aren't many mounting bolts associated with the job list.
https://shorturl.at/egoLU
I got my creases out by using
https://shorturl.at/buQZ8
after the deep cleaning, I used a handheld steamer to work the creases out.
Good luck!