Hard top rot

I have a hard top with integrated electronics box. Its full of rotten wood, but the rest of the boat is solid as a rock. It’s the stock top for a world cat 266 SC.

I have no experience working with composites, but I viewed some youtube videos and I might like to take on this job myself.

Would coosa board be acceptable to replace the wood? Is it worth cutting it up and fixing or could I just buy a new one?

What supplies/adhesives would you recommend?

What would be an approximate cost if I remove the top for a professional repair?

Has anyone used seacast for something like this?