I have three stones, coarse, medium, fine. All have a nice flat surface. I haven't needed to true up the grind on the Woodsman Elites like the original Woodsman heads.
Light strokes with oil on the stone, pushing point forward. Work the same number of strokes per side, three sides per head. Start coarse, work through to the fine. Very little pressure as you are finishing up on the fine stone. If you really want to go nuts take a piece of leather and some stropping compound after the stones. Draw the head backwards for this step. I usually skip it since they are very sharp coming off the fine stone.