It's interesting that they've added a note about the Linelocs slipping, I'm glad I'm not the only one who gets it.
I've set mine now, I put a good arc in the carbon rod, pulled plenty of line through and then put an overhand knot on the cord where I wanted to fix it, then just pulled it back through and locked it against the knot. I've only done the top ones so we'll see how it goes next week when I'm out.