Lots of small wooden blocks..

Sanded most of the distance blocks needed for the inwale by hand and pre-drilled holes for fasteners. Then glued port side spacers, port gunwale cap, a small strip of oak at the bow, and for luck scarfed some strips of ply that eventually will become the sides of my box boom. 

Used screws for the spacers and almost every clamp I could find for the gunwale cap.