The issue with the crock system is the cutting geometry is parallel to the cutting edge. Think of the mirco-surface of the cutting edge, it will appear like a raked sand surface with ridges that approximately follow the cutting edge with the ridges occasionally terminating in the cutting edge. And of course you can not hold the exact same location with each pull. This is not an ideal cutting edge where an ideal edge is a uniformly controlled edge. You can create a sharp edge but it won't be ideal.
And this is all assuming your blade starts at a narrow enough angle to engage the cutting edge and not the relief. It would be informative to learn the difference between light and heavy strokes, exactly which part of the edge is contacted.
Hunting partner used a similar carbide edge sharpening tool in the field and it made a significant improvement to his cutting edge but he started with a ridiculously dull edge.
