Note that these curves were lofted on a computer and probably are different than if a batten were used on a lofting floor.
Text describing the process is at the bottom of the doc.
Feel free to contact me if you have questions about construction issues. Closeup of one of the outer stems, plugs have not yet been driven to seal the screw holes. Side view of the same stem as at top right. Plugs have been driven. Note decks are now installed.