When I filled my H2O tank after winter storage, it popped a hole in the bottom. The hole was not on a seam, but upon inspection I noticed that the seams were leaching antifreeze. I decided to replace the tank. The board in the V-berth that covered the tank was fiberglassed in. It appears that the tank was put in during construction, then the V-berth board went in and was fiberglassed to the side walls inside the V-berth, then the shelving was fiberglassed in, then the uphostery padding was glued in, then the coach roof was put on. To get the V-berth board out, I had to cut it. To get the tank out, I will have to remove doors and trim. My question is this: Is the V-berth board fiberglassed in to provide addtional hull strength in the forward section of the hull? Do I need to fiberglass in the new board(s) to the hull or can I fiberglass in 2x4's laterally to the hull and screw my V-berth board(s) to them? This will still provide a fair amount of strength and allow much easier access to the tank if it ever needs servicing or changing again. Any input would be appreciated.