I am a lefty so my right calf and right forearm are bald from Sept till Jan. I shoot 3 blades and have no problem sharpening them with files and leather strop. However, I never was able to get a 2 blade or knife as sharp as I really liked. Yes, they would shave but not the full length of the blade sometimes and also took me lots of time.
Recently Robtattoo was nice enough to let me borrow his KME knife sharpener and I now know what a TRULY sharp knife or 2 blade is. Gutted two deer with Mason's Buck 110 folder and it will still shave ! We open our deer to the neck too so we cut thru cartilage holding the ribs to sternum. I promptly sharpened every knife we had and ordered me a KME !!! One of the most awesome tools on the planet IMHO.