>> 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 May cell 812.239.3359 PianoRebuilders.com 812.235.5272 Terre Haute IN 47802 _______________________________________________ David, The U3 may not accept a larger wheel without them binding on the case. As for installation, I use the tilter, position the dollies to line up with backposts as possible and screw the dollies to the bottom (pilot holes first) using pan head screws. Tilt the piano back to the floor (trust me guys this does work) and then screw the dollies to the back with hex head lag screws. You may only be able to get three of the four holes to line up on the back of the piano. The whole operation takes about 30 minutes (excepting the two miles you have to schlep the tilter from the parking lot to the piano!) Tom Driscoll _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives
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