Wow! Thanks for the through explanation, especially the structural information. That could be useful -- assuming the wife will allow me to put any holes in any wall (she's okay with the window shade anchor mod, just doesn't want ANY holes in any walls). I'll keep working on her.
Looking at the door problem again, I'll probably have to post a separate thread regarding that crack, including a pix or two.
I'm guessing the foam is somewhat more dense than a foam cooler, closer to a structural foam panel? In my experience, studs are almost never where you need them! In maintaining a 60+ year-old concrete block motel, years ago I started using almost exclusively Toggler Alligator anchors
http://www.toggler.com/products/alligator/overview.php#. While most of the walls were concrete, I used the same anchors in hollow walls, including walls with just standard paneling. Very rarely did I have to resort to lead anchors in the concrete. So do you think these might work for light applications in the PC? I'm thinking coffee cup/eye glass shelves, maybe a magazine rack.
And now I need to locate one of my two stud finders, both in storage, hopefully not buried too deeply. Else I'll be buying a 3rd.
My 2008 2551 does NOT have a piston-type door closer, just a regular door. But I see your point about rope vs. metal chain or cable.
As for the door stud for the rope: I think that you're saying that the door frame is thick enough to allow sufficient threads to accommodate the stress from a door swinging open, not necessarily due to a strong gusting wind, would that be correct? And any reason a 1/4" or 5/16" SS bolt couldn't be used instead of a threaded rod with a bolt?
The explanation you provided goes a long way to reassuring me I may be able to tackle some routine repairs or simple mods.
Thank you again,
--GeorgeB