I have some water damage from a leaking cockpit drain that was not installed properly. It has rotted part of a dividing panel in the engine compartment, I have cut the damaged area out and have the area ready for re-construction. I have discovered that there are several types of plywood available, Hydro-core, Okoume, and so on. I'm curious what would be the proper type to use in the repair. The dividing panel is one that separates the engine area from the compartment under one of the cockpit benches. Thanks in advance for any help.