A belated thank you to Kevin and Tom.  I was out of town for the holiday weekend.   The hatch gratings come next.  The gratings are made of two different types of slats.  The athwartship pieces are thicker and are notched to accept the thinner un-notched fore-and-aft slats.  These thicker slats rest on the coaming rabbet.  The notches are 0.05" wide and 0.025" deep (scale 2.5" x 1 1/4").  Let me tell you my grating construction technique.  First cut stock for both types of slats.  Cut individu