When resharpening a flat graver, do I still need to resharpen the heal? Right now My heal is somewhere around 0.4mm. I'm afraid if I do sharpen it, the heal will be longer.
unless there are scratches or gouge marks on the heel, the heel will not need touch up, just the face. if the heel is sharpened, yes it gets longer. long heels are to be avoided when doing tight curves. i don't know the sub milimeter dimension, but when you visually inspect the heel, one should not see a lot.