I redid it with a 12" long 2 1/2" diameter aluminum bar without a center. I did it just at the ends (9 inch measurement difference) and got it to measurement error. I then skimmed the whole 9 inches and did a final cut taking 0.002" off the diameter. Measured every inch over the 9 inches and every measurement was within measurement error (50 millionths of an inch or half a tenth). I am shocked that its is that good.
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1969 16" x 6' South Bend Lathe
Garage full of old Mopars........
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