Thanks for the reply. I am comforted to know that 600' will fit. And I do have a horizontal windlass so that's a bit easier. But now, you've added a new "twist" to the issue (and thanks for the link). Is 8 plait worth the added cost? I have triple braid now and the manufacturer for the windlass recommends triple braid in their manual - but I have seen several posts saying that the softer 8 plait lays nicer in the locker and tangles less...