Forward and aft plugs with tapers and lightening holes along with blanks for spacers:
The top & bottom pieces will be milled to 12mm x 27mm x 12' (yeah, I know, mixing systems there). I need a clear span of 24' to run them through the thickness planer but with WildCat and Gardens' hull occupying the shop, I cannot get the needed space without opening the overhead door. And it just wasn't warm enough for that today.
The intended assembly sequence is to glue the top and bottom pieces to the plugs and spacers, trace the boom's profile onto the plywood, cut the plywood sides slightly oversize, glue the sides to the plugs/top/bottom assembly and trim the ply to size with a trim router.