I loved the story and the suspense! I also have been hearing a hissing in the same area that you mentioned and what I had envisioned as something complex and expensive is most probably the exact same thing! Man you made me feel better thinking it might not be that bad after all! I have a '75 TMC MC-8 Crusader. I'll be glad to fix that problem because that's the only thing wrong with my coach!
I saw that greasy mess in there and that's kinda trippy in itself. But at least it'll make it easier to slide in and out of there!
Thanks again for the story as I know that's exactly what my coach is doing!