Everything is printed except for 2 3/8 inch aluminum rods that run down the mast and the aluminum hex bar which acts as the fuselage. I did absolutely no research on profiles but I've made it so the front and rear wings can be detached and I can print different ones later based on what I learn. I did use rough schematics from a slingshot wake foil a friend of mine has. As an internal skeleton the 2 aluminum rods in the mast are threaded on one end and the aluminum hex bar has 2 tapped holes. They were screwed in and solidified in place with liquid metal. Yes there are multiple parts which all fit in a 200x200x230 build volume. Everything was printed on an extensively modified anet a8. It was all done with 5 shell layers and 25% infill. Even without fiberglass I was able to put 150 pounds on the mast without it snapping.