I picked up a scraper blank from Doug at the symposium this last week. I wanted to make a thicker negative rake scraper than the one I now have. Mine is 1/4" thick and Dougs is closer to 3/8". I wanted a curved edge for box interiors and my square ornaments. I have made it an included angle of 78 degrees. I might try a more acute angle later but this one seems to work and was cut on the same table setting as my other scraper which is why it ended up at that odd angle. His tools are quite hard. I didn't ask what they are hardened too but on my 120 grit aluminum oxide wheel it didn't raise much of a burr. My older no name HSS scraper raises a nice burr on the 120 wheel. On the 180 grit CGN it raises a nice small burr. I polished that off and tried using a steel to raise the burr. It raises a larger burr. Maybe later today or tomorrow I'll have time to cut on a practice piece and see which way I like it.