I have a M8-4x Leupold which I suspected to have some issues. I sent it in and they completely went through it and replaced parts that needed rplacing. Thank you Leupold.
Had the same positive experience with Leupold about five years ago when I sent in my 40-year old M8-4X for service.
I was so pleased, I sent them a Thank You card.
Two weeks later I received a package with a Leupold travel mug and four hats!