I bought a used 1187 Premier trap and need to clean it. Can someone tell me what is the correct punch size to remove the two pins holding in the trigger group? Where can these be bought? Also It has a choke that needs to come out, not sure what brand, I think I need a universal choke wrench to remove it but I'm not sure again where to find these wrenches. I was thinking maybe their are some other tools that can be used instead of an actual punch that I have laying around that might do he job but dont want to risk scratching anything. Thanks