Either Work Sharp (original or KO) should work fine on the Spartan. I'd suggest getting comfy with the WS first, though. It might even be worthwhile to buy a cheap small kukri shaped blade or two off ebay to practice on first. If/when you do decide to do the Spartan, put some masking/painter's tape on the sides of the blade. Grit from the belts can collect on the guides and scratch the blade as you draw it through. The tape eliminates this. :thumbup: