The new 511 blade is subtly different. Deeper, shorter, edge trends upward out front relative to spine, can still reach in with front for detail work.





The older 510 has been resharpened as required, which is not too often, to return to as-shipped razor sharp with a few edge dinks from factory (from stabbing in dirty foam while handles trimmed).

Pappy, my sharpening method is simple. I just lay a small sheet of automotive paint dept at WalMart/Autozone sandpaper on the edge of a counter, lay blade flat and then roll over onto primary bevel, and strop backwards, starting with tip to prevent flat-spotting sides of tip, until I have a burr on edge, and then strop off burr on cereal box cardboard or whatever. Normally only need 1000 or 2000 grit, but might need coarser to swiftly work out a serious dink (rare).

The loose paper on a counter actually rolls around the edge as stropped and convexes to razor sharp, no soft backer required.

Just my simple way.