During the build I used three pieces of ply for the top deck. A small triangle at the bow. Then a long deck piece which joined the back piece just two inches from the back of the combing. This way I hid the main top join under the combing. Produces a nice clean deck line with that beautiful transition from the flat bow to the rounded hull. (No big join in front of the combing.
I used a slightly thicker fibreglass and also built the combing up with laminated ply. Thus the boat is very strong and also beautiful to look at.