I have CDI 2 on my 240 and just replaced the furling line. the original line from PO was 3/16", but I went with 1/4" after recommendation from Crazy Dave (thank you, Dave). Much easier to operate. I wouldn't go any bigger, though, as you're liable to run out of room in the drum. I ordered 30 feet of sta-set double braid, which is just right for my 240 with standard 110% genoa (measured drum to cockpit and added 15 feet).