I think it is the orientation of the casters in relation to the keyboard... There was a borderline(?) OT thread about this, some time back. Conrad Hoffsommer > From: jamesgrebe at charter.net > To: pianotech at ptg.org > Date: Wed, 22 Sep 2010 06:22:13 -0500 > Subject: Re: [pianotech] pianotech Digest, Vol 23, Issue 90 > > Pray tell, how would caster cups affect the tuning? > James > James Grebe Est. 1962 > Piano Tuner-Technician > Creator of Custom Caster Cups > Creator of fine Writing Instruments > Pump Organ & Plyr Piano benches > Table Timepieces > Theatre and Theatre Organ Historian > www.grebepiano.com > 1526 Raspberry Lane > Arnold, MO 63010 > (314) 608-4137 > Become what you believe > ----- Original Message ----- > From: "Phil Bondi" <phil at philbondi.com> > To: <pianotech at ptg.org> > Sent: Tuesday, September 21, 2010 8:23 PM > Subject: Re: [pianotech] pianotech Digest, Vol 23, Issue 90 > > > > > >> 3. Tuning stability problem (limhseng at gmail.com) > >> > >> > > Are there any caster cups under those wheels? > > > > -T. Driscoll -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100922/4d6a0b38/attachment.htm>
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