Thank you for this detail. I will try to figure out how much the error is and if there is anything I can do about it.The usual comment is that the spindle is "nearly but not quite" a #5 Morse .
A the difference in angle is about .92 arc minute. That predicts a difference of .0016 inch radius at 6 inches.
(I just drove to 3 auto parts stores - no Prussian Blue. )
I miss read the specs. This is wrong, see below.
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