I recently received a set of reground Spyderco knives from Tom Krein. The Delica is a ZDP-189 blade and started out as a full-flat ground blade. I then had Tom regrind it to an even thinner full-flat grind. My first question before all of this was what is the difference between a factory FFG and Tom Krein’s aftermarket FFG? Tom grinds the blades so that the thickness directly behind the sharpened area is about a quarter of the thickness of the factory blade.
According to Tom:
Most of the FFG’s from spyderco are still between .020″-.030″ just behind the sharpened area. I take them down to around .008″ plus or minus .003″. It does make a difference.
Here are a few pics: