What's Gosling Thread? Sorry to jump in so late on this but I have strong opinions on the subject because we do extensive retrofits of grand repetitions with cord for support springs and we don't want the stuff breaking down in the near or far future. My opinion is that ANY synthetic is liable to gas out and become brittle over time. My only faith is in natural fiber. We currently use braided linen cord that used to be used for dial cord in radios. Renner makes a standard cotten cord. "Silk" is great if it really is silk. Much of what is called silk is just shining synthetic that looks like silk. You can tell by burning it. If it melts down it's synthetic. If it burns and creates carbon it's natural. If you must go with synthetic I recommend suture cord sold for piano applications by Heckscher in London. David Stanwood >>> What I have used lately to repair grand repetition spring cords is >Gosling thread. << > > >What's wrong with the silk cord (#244945) listed on p.83 of the Apsco >catalog? > > >Rob Stuart-Vail
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