Thanks for the tip on Hobby Lobby, I was finally able to make it there this weekend and check out what they carry. In addition to the regular Alumilite resin, they also carry the two-part foam so I picked some up. I think I will re-do most of the above deck molds in the foam. I should be able to save 1 - 1 1/2 ounces. That amount of weight would be insignificant on most ships, but it will be important for the Gridley. Below you can see the torpedo tubes, the one on the quarter is regular resin and the other one is made from foam. There will be four of these on the ship.
