Discipline needs dedication. With that say, everyones are free to do as they please. Sharpening free hand is my divertissement and no jig consents the right sensitivity. To maintain the angle, normally I put my tumb over the spine, parallel with the stone at the desidered angle, and control the top of my tumbnail so it's costantly parallel during the sharpening job. Believe me, painting the bevels with the magic marker you will note a perfect sharpening trail all along. The angle is always that what you want, not the angle
predetermined by jigs.
-Nedo Cervar