My friend and I designed and fabricated a longboard deck out of twill weave carbon fiber plies. We began modeling the board off my old cruiser deck using Solidworks and 3D printed models for alterations. Once satisfied with the design, we had a mold routed and performed pre-preg layups. Many thicknesses were tested, and we finally landed on a 30-ply with 6 unidirectional plies for central structural support measuring in at 1/4 inch.