This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ---------------------- multipart/mixed attachment Zen, My take on the points in your query: 1. Tangle of Threads. Well put - fits the topic very well I'd say! 2. Alcohol and Water cause the wool bushing to get looser. The wool swells and is molded while wet, then it shrinks away from the pin when it dries back out. Susan gave a good description of this. The alcohol acts as the wetting agent, as well as a thinner for the water - in other words, the less water in the mix, the less "shrinking" affect on the bushing. Using pure alcohol will do little or nothing to the fit, unless it happens to wash something out of the bushing. 3. Naphtha does not displace water as far as I know, but the silicone might. Really, it works better at keeping water out - so if the parts are dried really well, and then treated with Naphtha and Silicone, the bushing will be slippery and the silicone will resist the return of the water. The Naphtha is a thinner and carrier for the silicone, plus it can clean the cloth a bit. Please note - Silicone creeps, and likes to walk away from the action center. Although I have never found an affordable way to prove this, I suspect that this is the reason that the parts don't stay slippery for ever - the silicone becomes less effective as it spreads itself out through the action. 4. Pro-tec is a good thing to make the parts slippery. So far it seems like a stable material, but the sluggish parts I have tried it on went tight again after a year or so. 5. Other wetting agents: Why use anything else when the alcohol works so well? Soap works, but it also leaves soap in the cloth. Finally, keep in mind that action centers go tight for lots of reasons, and the only way to free them up with real assurance is to take them apart, correct problems (bulging bushings, tight forks, you get the idea), ream / burnish and put a new pin in. Anything else will leave the potential of a returning problem, and perhaps more importantly will not give you the even friction from note to note that a good repining job can. Don Mannino RPT ---------------------- multipart/mixed attachment A non-text attachment was scrubbed... Name: not available Type: application/ms-tnef Size: 4203 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/62/41/a6/f0/attachment.bin ---------------------- multipart/mixed attachment--
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