I have several of Doug's scrapers. I prefer 3/8 inch thick, and about 1 inch wide. I also have several Craft Supplies house brand ones. I do a swept back grind for the shear cuts. Never used a negative rake scraper much. I do round over the edges of the scraper to make it slide more easily over the tool rest. Most of the time I use the burr straight from the grinder. If you have CBN wheels, they leave a better burr than the standard grinding wheels. You can hone the burr off and just use the sharp edge, or you can burnish one on. I prefer a triangle burnishing tool, like the ones for the card scrapers.
robo hippy