I have whats called a Waterdawg Kustomz hull, it is a stand up jet ski. It is made of carbon fiber with a fiberglass core. I have a bit of a project going on right now. The rear of the sky has a "sealed" cavity filled with foam that got somewhat waterlogged. I cut open the ski, removed all the foam, sealed it and foamed it. Now I am reinstalling the tray but im unsure how many layers of carbon fiber to use. I ordered some 19.7oz 2x2 twill from US Composites. I cut out 2 pieces for the bottom and for the gunwhales I am thinking 2 pieces as well. How would you go about doing this? Here's some pictures so it's easy to understand. The last photo isnt laid down yet, it's just 2 layers I cut out.