In this episode (S2-E44) of The Art of Boat Building boat builder Bob Emser show how the margin boards fit next to the floorboard in the Haven 12 1/2. Installing the margin boards requires several cardboard templates to be made. In wooden boat building the margin board and floorboards make up the sole of the small yacht. The sole is constructed out black walnut board that require re-sawing and surface planing. Once the boards are fitted a mixture of danish oil is discussed and applied revealing the beauty of the black walnut wood.