Making a fiberglass T-top

[Curapa]

I am beginning to plan the details of my fiberglass t-top build. I am tired of replacing the canvas.

My t-top is 59" x 75"

I would like some advice on how to build this. Should I encapsulate some ply or just do multiple layers of cloth until it is rigid enough to hold up?

I had thought about using 1/8" luan for the top wrapped in a few layers of cloth.

I am still in the brainstorming phase of the project and I could use some suggestions. The dimensions are shown in the attached pic.