Mine was finished with 3/4 fiber glass cloth, resin, primer, laquor for colors, and clear coat. It all adds up. A wing covered with monokote would cut the weight some. Upper deck was secured with metal pins mounted in wood blocks (male). These were on the hatch. In the fuse were wooden blocks with brass tubes (females) There was a wire that mounted to the fuse, the pipe went through, and a 1/4 turn aluminum fastener held the deck in place. I was orignally a little concurned, but it did work quite well. My exhaust exited out the bottom, which helped keep the gook off. Ran a streight stab-no adhedral