<HTML>Yamaha used to provide a kit to improve the low tenor = with wound bichords.  I did this once, and had  a favorable result.  Since I was replaci= ng 4 plain trichords (6 hitchpins) with 4 bichords, I had to add two hitchpi= ns.  I didn't get them in the exact right place, so my nice new Yamaha = strings didn't match perfectly, but it was a big improvement over the origin= al plain wire, and the piano owner who had been through a bunch of other tec= hnicians was happy. You also wind up with four dummy tuning pins (assuming you're doing this in = the field and not plugging the plate holes.) I don't think Yamaha provides the kit anymore, but they must have the inform= ation.  The kit had the strings, hitchpins, a drill bit for the hitchpi= ns (I think), agraffes and bichord damper felt. Gordon Large, RPT Maine (Colby College)</HTML>