请教一下各位老兄有没有分解过Tikka T3枪栓的。Mannual上的步骤如下：
1. Ensure the rifle is not loaded and remove the bolt from the rifle
2. Remove the bolt shroud by turning it clockwise until it stops and pulling it away from the bolt.
3. Insert the tip of a screwdriver (approx 3 mm wide) into the gap betweenthe cocking piece and the bolt handle retainer bushing. IMPORTANT! Do not remove the screwdriver tip from this location until you are ready to reassemble the bolt shroud.
4. Disengage the firing pin assembly by turning the screwdriver counterclockwise. Push the firing pin assembly forward until the locking cam of the handle retainer bushing touches the bolt's rear surface.
5. Release the bolt handle from the bolt body. If the bolt handle feels stiff and does not immediately pull out, you can tap it with a plastic mallet at the receiver end.
6. Remove the firing pin assembly from the bolt.
搞不懂第三步中插进去的那个螺丝刀头和第四步中要逆时针转动的螺丝刀是同一个吗？如果是，那里不像有可以供螺丝刀旋转的空间；如果不是，第四步中的螺丝刀，应该在哪里？