The original knife sharpening jig I had wasn’t designed for use with belt grinders or, to use a more technical term, linishers. It was designed for grinding wheels, so it could take advantage of the curvature of a wheel, and it didn’t have to be so thin. A proper knife holder would be slimmer, which would be the main difference. While the jig I had worked well with sharpening wheels, it wasn’t 100% compatible with flat sanding belts and its protruding knobs were always in the way. It could only be used on one side and couldn’t be flipped over.…