Hi folks, this is my first post on the forum. I purchased a 2003 366 Carver a little over a year ago and I am updating and cleaning up issues. My hot water heater is located under the bed in the aft cabin. The hot water tank appears to have been leaking for some time. I believe I can change the hot water heater out ok. What I need help with is the wood under the hot water heater. You can see from the attached pictures that the plywood the tank sits on has become rotten. I am nervous to go in there with a sawzall and cut up the rotten plywood for fear of hitting plumbing, wiring and stringers under the plywood. I think if I want to take the plywood out in one piece, I will also have to remove the freshwater tank as well. Any advice or words of wisdom?