morning gang, In my current status of bein laid up I have sharpened every pointy thing in the house. I found a couple of tips that may help some guys havin problems. On 3 blades woodsman and snuffers, I found using a 12" and 8" file together seem to work better. I use the 12 to start with going across the blades back to front then the 8" LIGHTLY in the same way. I have gotten both heads incredibly sharp. For the guys wanting to try simmons sharks I bought a 6" tri file. It is the ticket for working concave heads the narrow design of the file fits perfectly in the gap on those heads.