Hillbilly, that's a beautiful piece of work no matter how you cut it (so to speak). I never the heard the term FOG before either, but find the idea interesting. I don't have anything but spalls, but it seems as though it might be possible to flake a spall reasonably flat, do some grinding on it to clean up the edge and increase my chances of getting a decent flake pattern, which is not my best suit. The Egyptians and Danes probably didn't work from slabs; or did they. Anybody know?