I have the bubble door frame. than clear lexan is on the top and bottom with a strip of fiberglass in the center where the controls for the doors are. I really like this cus it's light and I can see the wheels when I land. yup like that part. I never look out over the top when landing, nope, quit that long ago.
oh ya another thing. I think the lexan is .060 on the doors. makes em even lighter.