After I had the two side support pieces made I glued and screwed them into place on either side of the opening. I used 5200 and about 8 screws to each piece, so I don't think they are going anywhere.
But just to make sure I also glassed them on each side with 3 layers of 1807 biax tape. This way the drains will be completely sealed.
The aft wall of the locker was next. This actually separates the propane locker from the flash heater compartment. Both side of the plywood were coated with 1 layer 1.5Oz Mat and 1 layer of 2415 Biax cloth before being installed. It will be glassed in on both sides.
The real beauty of this design is that the propane tanks, the stove and the flash heater are right next to each other. So the longest propane line with be about 12" long. The regulator, transfer valve and shut off valve will all be right in the same locker.
Next I built the two remaining walls that form the area for the 4th tank under the cabinets. Each panel was coated with resin then glassed on the locker side before installing. All the joints were then glassed on the inside of the locker to seal all the joints.
After fairing all the corner glass work in I gelcoated the whole interior of the locker. I am not sure why but this is the only picture I could find of the gel coating. I will have to take some more tomorrow.
The final step was to put the top on the area where the 4th tank lives. It was glued and screwed together with 5200. So now the whole locker is sealed off from the rest of the interior of the boat. All I need to do is cut the drain hole in the side of the hull. I made the floor of the locker so it would drain to that hole.