What's the best way to make sure I don't get those ugle scope marks when I mount my new scope?
I've heard that you can get a sleeve or something that helps prevent that. Where do you get them? Are they a waste of time?
My old scope must have slid at one point because it has NASTY ring marks on it, and I don't want to torture my new scope in the same manner!
Any thoughts?

I've heard that you can get a sleeve or something that helps prevent that. Where do you get them? Are they a waste of time?
My old scope must have slid at one point because it has NASTY ring marks on it, and I don't want to torture my new scope in the same manner!
Any thoughts?
