We are changing out the halyards of our Hunter 235 we just purchased this year. The one was a little frayed and we were a little concerned out it. Plus, they are really dirty. I understand the mechanics of having to cut the shackle off and "sew" the new line onto the end of the cut, BUT, what is the best material to use to sew the two together? Trilene fishing line? heavy duty nylon tread? What the best way to secure the two together. I am have really leary of doing this but it needs done. Any suggestions out there?? Best to have the mast up? down?