Further to this older post that I couldn't reply to:

www.seabreeze.com.au/forums/Windsurfing/General/Raceboard-World-Championship-2016/

I have a couple of F2 lightning boards (circa 1991 model, 249L volume with carbon centre boards) that could be available for hire for the Worlds.

They are both still original weight and I have found them to be quite competitive, especially in light to moderate winds.

You would need to bring a rig to suit the division you want to compete in.