I taught myself to restring the blinds several years ago and have been using the cord from Specialty Blinds or Joann Fabrics, even Wal Mart. I've been wanting to try fishing line. I couldn't find the braided line so I bought 30# clear line at a sporting goods store and retstrung 2 small ones several months ago. It's working pretty smooth but the metal parts are scraping against the line and I don't know how long this will last. I don't like the MCD shades because I keep my shades down while traveling (to keep heat out) and the MCD shades aren't connected at the bottom and flop around. To each his own!