I am a S&W revolver nut, as well as a 1911 nut, and a Glock nut. I have a lot of very fine S&W revolvers, all but three of which are pre-lock. I hate the thought of that lock. So, I have been cruising the net trying to find out whether I could take the lock out myself. I looked at videos, forums, emails, and everywhere else, and cobbled together the knowledge of how to do it. It is very confusing, because S&W apparently changes everything every so often. Which makes a lot of the info out-of-date. But, after much study, and a lot of digging around in the guts of my fine revolvers, I think I have successfully removed the abhorrent locking mechanisms from my 357PD .41 Mag, my 686-6 .357 Mag, and my 637-2 Airweight .38 Special. I am taking them to a good gunsmith tomorrow to make sure I haven't screwed up. I am pretty proud of myself.