Bay Pilot 18 kit, using the following plywood: 6mm 5 sheets (61.92):9mm 19 sheets (75.24):12mm 1 sheet (97.92): 18mm 6 sheets (130.27) Prices specially discounted for Boat-kit plan. HydroCore is less 10% from okoume pricing. Powerply is plus 5% additional on okoume pricing.