-----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Dean May Sent: Wednesday, March 24, 2004 8:37 AM To: Pianotech Subject: RE: New wheels for a Yamaha U3 >> I've installed twin dollies available from Schaff or Jansen many times on school pianos and they work very well . The Schaff set is around $100 and Jansen $120. I'm not sure if there is much difference between them but I'm not sure. Maybe the Jansen set has better casters. Just a word of caution: The problem I've seen with these twin dollies is that they don't support the piano where it was designed to be supported, particularly the key bed, which allows sagging. I've seen pianos in institutional settings with these dollies with regulation problems and eventually loose keybeds. Dean Dean _______________________________________________ Dean, Interesting point but I do not quite understand how the dollies can effect key bed support. The arms of the piano are screwed and or glued to the side and the key bed is secured to the arm. Indeed the front casters are no longer on the ground but with the dollies positioned as far to the end of the piano I feel there is a wider base of support for the piano. Your observation would lead one to the conclusion that every vertical piano with "European" styling I.E. no front legs would develop a sagging key bed. I've installed these for over 20 years on mostly Hamilton's, Everett and Yamaha 45" studios and have never seen a sagging or loose key bed associated with the use of these dollies Respectfully Tom Driscoll RPT P.S. I forgot to mention that I remove the old casters ---They don't touch the floor anymore and will rattle-buzz.
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