with the pilot house well on its way, I decided to tackle the bulwarks around the perimeter of the hull. I made the rib extensions from 1/16 birch plywood. I left a tab on the end of them that would fit into a notch I milled into the deck. These were cyanoed into the notches to hold them in place. As a guide to their installation, to keep them all in line, I installed the first and last of a row, then clamped a piece of bass wood across them from end to end (see pic). I could then move the remainder up to the basswood guide and cyano them into place. This ensured they were all, more or less, in line from end to end.
When these were all in place I cut the bulwarks from 1/32 birch plywood and trimmed and installed them onto the frame extensions (see pic). Again, they were cyanoed to the frame extensions. At the joints a piece of ply was cut that fit between the frame extensions exactly and cyanoed those in place. This gave a strong backing for the bulwark butt joint.
In order to form the bulwarks around corners, the ply was steamed over a kettle until the ply could be bent smoothly without cracking. An industrious person could probably make a steamer from some ABS drain pipe, or similar, that could do the job more efficiently.
John