At 05:32 PM 8/16/97 -0500, Vanderhoofven wrote: > IT WORKS! Congratulations! Those upright sostenuti can be can be a monumental pain (I hope there's a special circle in hell reserved for the designer/inventor, who would have to spend eternity regulating them. Such trouble for such a rarely used contraption!). >Thank you for your help! You are very welcome - glad to have been of help. >The DELRIN (not teflon) bushings were worn and >misshapen. That indicates that at some point someone put too much pressure on them (probably by overtightening the brackets). It shouldn't happen if all is as it ought to be... The delrin bushing design does work - though it has very small tolerances. Once you lose the factory setting, it's hard to re-establish it (as I found out) - which is why replacing them with cloth is so much easier, even if you do have to use trial-end-error to figure out the right thickness cloth. Now, you might still want to get those Steinway technical bulletins - on the sostenuto regulation and some of the other topics they cover (I think there's one on grand sostenuto, one on voicing for Steinway hammers - they prefer the term "tone regulation" - and some more I don't remember). The upright sostenuto bulletin also contains the procedure for regulating the other type - neoprene tab - upright sostenuto, which is a bit more complex than the cloth type. I think you can get them from Steinway Technical Sevices - (Michael Mohr?) Israel Stein, RPT P.S. Don't worry about the length of your posts. If all they contain is necessary detail (which yours do) that makes useful replies so much easier to provide.
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