I got a new spring kit from Wolff Springs but I can't figure out how to change out the trigger and sear springs. I went to Suplusrifle.com and my pistol doesn't look like the one they show. On thier site you can clearly see a pin that goes through the side of the trigger guard which you knock out and the trigger comes out. On my pistol (dated 18.9) the place on the trigger guard where you expect to find the cross pin is smooth. Even under a strong light with a magnifing glass I don't see anything except smooth metal. Did the Japanese have differnt ways of keeping the triggers in? Looking from the top I can see the pin but it doesn't look like it goes all the way through the trigger guard. Any advice?