I have a question about a couple of blocks on the deck on the port side of the hatch. In the manual, both the original and an electronic download, the deck hardware diagram ID's the blocks as "15". However, the Deck Hardware List for the 260 is actually the list for the 270, and does not show a part "15". Does anyone have a proper copy of the 260 Deck Hardware list, and does anyone know what these blocks are for? I've been sailing the boat for three years without using them, but am very curious as to their purpose.