I just got my knitpicks options interchangable knitting needles today. I love them. I'm totally new to the interchangable needle thing, so I have one question. How in the world do you use the cable key? I know this is probably a stupid question, but I'm confused. I put it in the hole, and screwed my needles in, and the thing is, it looks like it would be pretty impossible for my stitches to move smoothly on the cable. Anyone have any advice, or am I just being stupid here lol? TIA!