Thanks Mark Schecter for the links: in part three of "Touring the factory" they are running lids through an electronic sander. Elaborate on this, anyone? ....and assuming that is an "absolute flatness/levelling" device, any way we can approximate that level of measurement in a small rebuilding shop? Laser beams , etc.? Albert Thomas, B.M., M.M. , Associate Member PTG Auburn University Thomas Piano Service
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