The centre portion of the centre seat in this boat was left unfoamed so that it could serve as a permanent storage compartment for boat-safe items and boat licensing. A deck plate is both a waterproof and inexpensive way to gain access to this compartment. Today I picked up the deck plate I ordered…$20 for an 8″ opening. I centred it, traced the circumference, cut out the opening, and verathaned the raw wood. I need to let it dry. I also need hardware to fasten it down and will use a rubber gasket to seal the mounting.