I am the owner of my second boat, It is an 89 vip valiant sport . I got a good deal cause the motor was blown. Before I put my put my motor in I want to fix the soft spots in the floor. I tore up the carpet and about a 4 by 4 foot piece in the middle around the storage hole is rotted. It's half inch plywood glassed over, my question is can I build a frame across the middle and lay over it to omit the hole?