My first idea is as follows: first layer (starting from the fabric that touches the water) carbon fiber red / blue 200 g, 300g white Diolen, Lantor soric 2mm, 200g carbon fiber, core closed cell PVC foam inserts with 5mm steel and cut into 3 strips imitating the board displayed on the video, surrounded by strips of carbon, carbon fiber cloth following 200g, Lantor soric 2mm, white Diolen 300g, and finally a carbon fiber fabric 200g. nuclei are those that mark the different levels, so the first soric, does all the size of the board, pvc foam the core of the smallest, and the next soric softens as being between 2 levels, while fabric cover the entire board.