Got the CB rough shape. I'll work on this off and on until it's just right. I used a NACA10665 shape. Not sure what that means but it works for this blade. One of my other favorite tools did this. The electric hand planer! Made short work of it. I used the spoke shave to clean it up and the rasp to round every thing up. I also put a coat of resin on the bottom. That's going to substitute for paint primer.