For those of you still reading this post and wondering about the sagging/ warped roof around the roof vent, there isn't much news. I did pick up a composite hokey stick at "Value Village" that I plan to cut up into a spar to support the roof from the inside. I intend to glass it right to the ceiling before I put the headliner carpet back on. Unfortunately I have to wait a month or two for the weather to warm up. It is too cold in the garage right now and I don't have an effective shop heater. That's alright though I have lots of other items on the "Honey-Do" list anyway...
When I start the project, I am sure I will have more posts and questions.