Does anybody know of any difficulty in drill and tapping a ca.1983 Mossberg 500 for a Weaver scope mount? I have heard rumors not to tap because of aluminum receiver. I have the right mount from Weaver but will need to take to gunsmith (some distance away) for drilling and tapping. I sort of want to be sure before I destroy gun and I have had gunsmiths do the wrong thing before. I don't want side saddle mount, so don't even bring it up.