Has anybody ever had trouble with the aluminum or plastic trigger housing? I have a few 870's and have heard all the preferences and prejudices about aluminum and plastic. Brownell's at one time sold a steel trigger housing. I cannot imagine wearing either out, but if there is a weakness somebody in the population of millions of these guns will find it. I can imagine a policeman using one as a club and bending an aluminum trigger guard to the point of jamming a trigger, but it's hard to imagine a cross pin wallowing out a hole to the point of malfunction. Maybe it has happened????