Nate Perkins notes:

(Doug Miller) wrote in
. com:

Gotcha. And quoted directly from that page:
"Product Description Specifications: Edge straightness .0002" per
foot."

Sheesh.

0.0002"=5 microns off straight over a foot
0.002"=50 microns off straight over a foot

For reference, a human hair is about 100 microns thick. Talk about
splitting hairs.

And anyone who REALLY gets their tools set up to .002" is way past where they
need to be when working wood.

Results on the best days are going to be within 1/64" or so, with the very,
very, very occasional dip to 1/128". Unless you're making a damned small box,
moving it from bedroom to kitchen when the dishwasher is in use will make it
move nearly that much.

With my eyesight as it is now (fairly good except for excessive floaters), I
doubt I could see a difference between 0.0002" and 0.002" on my table saw table
even if the straight edge would show it. And if I could, I'd still leave it
alone.

Charlie Self
"One of the common denominators I have found is that expectations rise above
that which is expected." George W. Bush