Mr. Wizard, Using hacksaw blades was my first move. I actually found 3 old hacksaws (all different brands) and I was thinking of using the whole saw (turning the blade in a saw at 90 degrees) in the shredding board since such application of saws could provide tension for the blades to keep them from sagging. I stuck when I figure out that I for some reason can not make the blades sharp. After I finished sharpening the edge cuts paper (to a degree) but does not cut cabbage. I think my problem was that I did the angle too sharp - about 14 degrees on one side only. No matter how hard I try the apex feels rough for the touch by a finger. I also was surprised how long did it take to sharpen it. First I took off 2/3 of the bevel with a bench grinder (I did not want to go close to the apex not to overheat it) and then I use my self-made machine to finish it up. It took me 15 minute of constant cutting using the cheapest coarse and medium water stone to get to burr. Then Arkansas stone and ceramic honing could not achieve desirable sharpness.