Ebb,
Refering to post#125 on p. 9

I have a question (go figure) After filling the gap between the cabin top and the headliner around your main ports, how stiff did that region become. If you push out on the port opening with one hand and eight inches away you pull in with your other hand, how much twist, if any, do you get?

Also, what is the average thichness/dimention from outside cabin top to inside liner around the opening?

Thanks, Tony