The commercially available sharpeners seem to be overkill to me, especially the worksharp with it's 2 diamond grits, 2 ceramic grits, the guide system, and the strop. I don't need a guide, don't need ceramic if I have diamond, and don't need a coarse grit. A small strop is all that should be needed in the field. Just a piece of 1/4" plywood with leather glued on and treated with diamond grit will quickly get a blade back to shaving sharp if you don't let your blade get so dull it needs a stone.