Hi all and hope you had a good day. I am contemplating having my model 500 drilled and tapped for a sling. Its an 8 3/8 with the original style comp. I want to have the underlug drilled and tapped to accept a sling swivel stud. I have not found a holster i like except for a leather western style built with a bit of drop. I think that a sling would be better and if i ever scope it that will help accomodate it too. Is there any reason to not drill that area other than any value/collectibility loss. I have never "ruined" a S&W in my life but i dont think it will hurt this gun that much. Oh, and on another note, i was running some 240xtp semi-heavy handloads in my 629-8 today and the locking mechanism locked itself. So it for sure does happen. Any input on the 500 is appreciated. Thanks guys and have a great evening.