IMO, it's silly to build a boat with a nice, low aft deck, then put a tall, traditional coaming on it, as it defeats the purpose of making the deck easy to lay back on. I make my coaming hoops 1" high and build up the lip from 2, 1/4" x 1/4" strips. That leaves 3/4" under the lip, which is plenty for any type of spray skirt, akuilisaq or tuiliq to fit under. For more details, see my "SOF Building Tools and Jigs" album on Webshots at the link below. The coaming pics are on page 3 of the album.