See...even Kimball could do some things well. ddf Delwin D Fandrich Piano Design & Fabrication 6939 Foothill Court SW, Olympia, Washington 98512 USA Phone 360.515.0119 Cell 360.388.6525 del at fandrichpiano.com ddfandrich at gmail.com -----Original Message----- From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Ron Nossaman Sent: Tuesday, December 13, 2011 11:19 AM To: pianotech at ptg.org Subject: Re: [pianotech] Un-Grand revisited I've read that the Phillips was designed to cam out before it reached damaging torque levels, like the hex drive or Robertson. Kimball refined this to an art form by spinning bits in Phillips head screws until a smooth conical crater formed, eliminating all hope of removing the screws at some later date. Other manufacturers tried, but never quite reached Kimball's level of expertise at screw head stripping. Ron N
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