Koz you and I are like minded across the board on this one. I think the core should be tabbed in as a unit.Thanks for the reply on the pm. I am still trying to figure out what I want to do with that dead space behind the tank coffin. I really like what u did with yours. If you can shoot me the photos/ info on those molds I will be sure to get you my photos/info on my transomI thought you were gonna do a SeaCast poured transom?