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- Sep 29, 2014
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- 2,102
A large granite surface plate might work, but you would have to 4 corner level the base first before trying to measure flatness. I assure you that cast base is not likely to be perfectly perpendicular between its precision top surfaces and its feet.
Indeed, we have a 4' X 8' X 24" granite plate, excellent for such work. Probably not accurate enough for hobby work however.