500WE I always reseal all screws and check periodically ,as you said things vibrate loose and always at the worst possible time. I never trust any trigger or safety completely, and I don't think anyone, who has done this for any length of time does either. There is no substitute for proper gun handling. I was taught at an early age ,the only real safety on my guns was me. I have passed that lesson on to my kids, and grandkids.Some lessons learned are to important not to pass on.