And those repair procedures were completely wrong for the material. Yet this technique continued to be taught for several years after it was known and demonstrated to be inadequate. Workable techniques did not come into being until they -- along with the appropriate tools -- were developed independently by piano technicians. Once we had the appropriate tools and had figured out how to service the things these actions became increasingly reliable and the benefits of synthetic bushings began to be realized. Of course, by then the damage was done and another fundamentally good idea had bitten the dust. ddf Delwin D Fandrich Piano Design & Fabrication 620 South Tower Avenue Centralia, Washington 98531 USA del at fandrichpiano.com ddfandrich at gmail.com Phone 360.736.7563 -----Original Message----- From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Horace Greeley Sent: Sunday, November 28, 2010 7:40 PM To: caut at ptg.org Subject: Re: [CAUT] Teflon Bushings ... Perhaps more importantly, the solid-bushed Teflon action was a number of years into production before any procedures for servicing it was available, let alone tools with which to perform the service. It wasn't until things were largely at crisis level that Freddie Drasche started teaching his home-grown technique of rolling brass center pins between two files.... Too bad...still an excellent concept...once fully worked through, it's very stable and will last a long time. Best. Horace
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