Ok Jose, this one's for you...I don't have the technology nor the know-how to post pictures, so here's the instructions on how to make a rope stopper for your hanks. It took me a while to figure out how to explain this.
The short version: Make several layers of west country whipping until you get a thickness suitable to make a stopper.
The long version: How to do west country whipping. To do WC whipping you have to be able to do a simple overhand knot - that's half a reef knot, or the over-and-under thing you do before the bow when you tie your shoes. Take about a foot of very light line or rather heavy string, start in the middle with even lengths on either side. Tie an overhand knot on one side of the wire where it meets the turnbuckle. Now, pass the ends of the line around to the other side of the wire and tie another overhand knot above the first bit of line. Keep doing that, one side then the other, pulling the knots snug and firming them down on the one below - that's west country whipping. Keep going for, say, six or 8 passes, or more if you want to be extravagant. As whipping, once you got enough passes on the rope you were finishing you would tie off the last course with a reef knot or two, then singe the ends of the whipping twine. For this job, however, what you'll do is start working down over the whipping you've just done and make it two layers thick. Once you get to the bottom, turn and go up again for three layers. Do this until you have enough to stop your hanks or until you run out of string. Just to make it look mildly spiffy, I made each pass a few courses shorter than the last so that the work bulged slightly in the middle. It sounds very yachty, but really it's just a pile of knots. As the late canoe guru Bill Mason once wrote: if you don't know knots, tie lots.