Thank you very much for the detailed instruction, Charles. Yes, it will also change the sound brighter from the smaller diameter, and the harp will have to be reregulated, but fluorocarbon absorbs very little humidity from the air, and retains its strength in high-humidity environments. At the same tension, fluorocarbon will be smaller diameter, which may involve lever changes, depending on which brand of levers you have on your Prelude. If you talk with L&H, perhaps they have worked out a safe restringing schedule for fluorocarbon. One further thought: with year-round high humidity, you probably go through a lot of gut strings. There are even pins available made of stainless and titanium. That is only a problem if the rust is causing the excess friction. If the pins are actually rusting or corroding where they go through the neck, you might want to think about replacing all the pins with some with a heavier plating. When you do have the pin out, carefully clean and examine. Not sure if this will work out, but I am sure that you can not reuse the string if you cut at the other end. I’d recommend a figure-8 knot very close to the end, if you decide to try it. You should know it will be very close at 6 wraps, and you’ll have to tie a short knot at the soundboard end for it to work. If you have 6 or more wraps on the pin now, it _might_ be possible to cut the string at the _knot_ under the soundboard, repair, then reknot and have enough string length to reuse the same string. You need 2-3 wraps on the pin after repairs. Each wrap around the pin corresponds to about one finger’s width of string length. Now, regarding the string: you may choose to leave it alone–but it will likely be a long time before 5A breaks on its own. If mail from the US gets to you easily, however, you could, of course get one from Lyon and Healy. Precisely measuring the large diameter, small diameter, and length will allow you to cross match from Aoyama or Salvi, or someone closer to you than L&H.
That will probably have to be mailed to you, however, tapered pins are standard sizes. Then get a new pin the correct length _and_ diameter. It will come out and fall all at once, and you don’t want it to hit the soundboard. Be sure you have a hand on the other side to catch the pin. It won’t take much force with no string tension on the pin. If the string is jammed tightly against the neck, the only way I know to repair is to cut the string, unwind it backwards off the pin, TAP the pin out with a small hammer.
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