If you want to stock-up....the above is tops.
That's only half the equation.
At least as important is the very-best surface-finnish quallity,
you can possibly muster, on your shaft.
Perfect roundness....and preferably a burnished finnish.
Poor-man equivalent....would be 1000 gritt emery
completely worn-out and run for some-time dry.
very little axial movement of emery, and low pressure.
The waste shaft-material imbeded in the paper
burnishes the shaft surface.
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