I finished drilling, tapping, removing casting sprues, heat treating and tempering all parts of this Siler Kit. They are not something you just slap together. I've had it in a box for years as I bought it back when they were $59.95 and finally got around to using it in a pistol build. It sparks and works great after test assembly and was pretty smooth as is but could use some more slicking up. Any of you who have built these kits have a good suggestion as to what method works best to finish the action?