Thanks for the info. It sounds like the consensus is to run the CLC supplied weather seal (3/4″?) around the sides and top, directly on the edge of the hatch and then add a piece to the aft/bottom edge if needed after testing. Looking at my hatch I don’t have a lot of space between the top wooden drip edge strip and the edge of the hatch, maybe 3/8 to 1/2″. Did you find you had to cut or compress the CLC supplied seal to fit it along that edge or is my reveal shorter than average?
-mike