C&J made a cockpit enclosure for my B36(2002) from a pattern they held in stock and without any visit to the boat (my request) to check those measurements. It duly arrived and I fitted it myself from their detailed instructions. The stainless tubular supports they provided with the enclosure were marked with plastic tape, red for port side, green for starboard, 1 strip for the forward arch and two strips for the after arch. It fitted a treat back in 2011, and still fits well, though there has been some wear in way of the winches for the Genoa sheets, and the bungee cords securing the bottom edges to the cockpit coaming are showing some signs of needing renewal. During the season the enclosure remains in place except when I go sailing, so it's up at least 90% of the time, and for three of the winters it has remained in place continuously. It still looks good, though I haven't used any waterproofer on it yet (thanks Mark, I'll take a look at doing that). All in all I can thoroughly recommend C&J Marine.